nicholsr                Sun Jun  7 21:01:52 2009 UTC

  Added files:                 
    /php-src/tests/lang foreachLoop.008.phpt foreachLoop.005.phpt 
                        foreachLoop.011.phpt foreachLoop.015.phpt 
                        foreachLoop.014.phpt foreachLoop.013.phpt 
                        foreachLoop.003.phpt foreachLoop.001.phpt 
                        foreachLoop.009.phpt foreachLoop.006.phpt 
                        foreachLoop.016.phpt foreachLoop.010.phpt 
                        foreachLoop.017.phpt foreachLoop.007.phpt 
                        foreachLoop.004.phpt foreachLoop.012.phpt 
                        foreachLoop.002.phpt 
  Log:
  New tests for foreach loops. These were written by another member of the 
Projectzero team. 
  
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.008.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.008.phpt
+++ php-src/tests/lang/foreachLoop.008.phpt
--TEST--
Foreach loop tests - error case: reference to constant array, with key.
--FILE--
<?php
foreach (array(1,2) as $k=>&$v) {
  var_dump($v);
}
?>
--EXPECTF--
Fatal error: Cannot create references to elements of a temporary array 
expression in %s on line 2

http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.005.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.005.phpt
+++ php-src/tests/lang/foreachLoop.005.phpt
--TEST--
Foreach loop tests - modifying the array during the loop: special case. 
Behaviour is good since php 5.2.2.
--FILE--
<?php
$a = array("original.0","original.1","original.2");
foreach ($a as $k=>&$v){
  $a[$k] = "changed.$k";
  echo "After changing \$a directly, \...@$k is: $v\n";
}
//--- Expected output:
//After changing $a directly, $...@0 is: changed.0
//After changing $a directly, $...@1 is: changed.1
//After changing $a directly, $...@2 is: changed.2
//--- Actual output from php.net before 5.2.2:
//After changing $a directly, $...@0 is: changed.0
//After changing $a directly, $...@1 is: original.1
//After changing $a directly, $...@2 is: original.2

?>
--EXPECT--
After changing $a directly, $...@0 is: changed.0
After changing $a directly, $...@1 is: changed.1
After changing $a directly, $...@2 is: changed.2

http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.011.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.011.phpt
+++ php-src/tests/lang/foreachLoop.011.phpt
--TEST-- 
Changing from an interable type to a non iterable type during the iteration 
--FILE--
<?php
echo "\nChange from array to non iterable:\n";
$a = array(1,2,3);
$b=&$a;
foreach ($a as $v) {
        var_dump($v);
        $b=1;
}

echo "\nChange from object to non iterable:\n";
$a = new stdClass;
$a->a=1;
$a->b=2;
$b=&$a;
foreach ($a as $v) {
        var_dump($v);
        $b='x'; 
}

?>
--EXPECTF--

Change from array to non iterable:
int(1)

Warning: Invalid argument supplied for foreach() in %s on line 5

Change from object to non iterable:
int(1)

Warning: Invalid argument supplied for foreach() in %s on line 15
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.015.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.015.phpt
+++ php-src/tests/lang/foreachLoop.015.phpt
--TEST--
Directly modifying a REFERENCED array when foreach'ing over it while using 
&$value syntax.
--FILE--
<?php

define('MAX_LOOPS',5);

function withRefValue($elements, $transform) {
        echo "\n---( Array with $elements element(s): )---\n";
        //Build array:
        for ($i=0; $i<$elements; $i++) {
                $a[] = "v.$i";
        }
        $counter=0;
        
        $ref = &$a;
        
        echo "--> State of referenced array before loop:\n";
        var_dump($a);
        
        echo "--> Do loop:\n";  
        foreach ($a as $k=>&$v) {
                echo "     iteration $counter:  \$k=$k; \$v=$v\n";
                eval($transform);
                $counter++;
                if ($counter>MAX_LOOPS) {
                        echo "  ** Stuck in a loop! **\n";
                        break;
                }
        }
        
        echo "--> State of array after loop:\n";
        var_dump($a);
}


echo "\nPopping elements off end of a referenced array, using &\$value";
$transform = 'array_pop($a);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nShift elements off start of a referenced array, using &\$value";
$transform = 'array_shift($a);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nRemove current element of a referenced array, using &\$value";
$transform = 'unset($a[$k]);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nAdding elements to the end of a referenced array, using &\$value";
$transform = 'array_push($a, "new.$counter");';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nAdding elements to the start of a referenced array, using &\$value";
$transform = 'array_unshift($a, "new.$counter");';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

?>
--EXPECTF--

Popping elements off end of a referenced array, using &$value
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=0; $v=v.0
     iteration 3:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}



Shift elements off start of a referenced array, using &$value
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
     iteration 2:  $k=0; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
     iteration 2:  $k=0; $v=v.2
     iteration 3:  $k=0; $v=v.3
--> State of array after loop:
array(0) {
}



Remove current element of a referenced array, using &$value
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
--> State of array after loop:
array(0) {
}



Adding elements to the end of a referenced array, using &$value
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(2) {
  [0]=>
  &unicode(3) "v.0"
  [1]=>
  unicode(5) "new.0"
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=new.0
     iteration 3:  $k=3; $v=new.1
     iteration 4:  $k=4; $v=new.2
     iteration 5:  $k=5; $v=new.3
  ** Stuck in a loop! **
--> State of array after loop:
array(8) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(5) "new.0"
  [3]=>
  unicode(5) "new.1"
  [4]=>
  unicode(5) "new.2"
  [5]=>
  &unicode(5) "new.3"
  [6]=>
  unicode(5) "new.4"
  [7]=>
  unicode(5) "new.5"
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=new.0
     iteration 4:  $k=4; $v=new.1
     iteration 5:  $k=5; $v=new.2
  ** Stuck in a loop! **
--> State of array after loop:
array(9) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(5) "new.0"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  &unicode(5) "new.2"
  [6]=>
  unicode(5) "new.3"
  [7]=>
  unicode(5) "new.4"
  [8]=>
  unicode(5) "new.5"
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
     iteration 4:  $k=4; $v=new.0
     iteration 5:  $k=5; $v=new.1
  ** Stuck in a loop! **
--> State of array after loop:
array(10) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
  [4]=>
  unicode(5) "new.0"
  [5]=>
  &unicode(5) "new.1"
  [6]=>
  unicode(5) "new.2"
  [7]=>
  unicode(5) "new.3"
  [8]=>
  unicode(5) "new.4"
  [9]=>
  unicode(5) "new.5"
}



Adding elements to the start of a referenced array, using &$value
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(2) {
  [0]=>
  unicode(5) "new.0"
  [1]=>
  &unicode(3) "v.0"
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(8) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  &unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(9) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  &unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
  [8]=>
  unicode(3) "v.2"
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(10) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  &unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
  [8]=>
  unicode(3) "v.2"
  [9]=>
  unicode(3) "v.3"
}

http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.014.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.014.phpt
+++ php-src/tests/lang/foreachLoop.014.phpt
--TEST--
Directly modifying a REFERENCED array when foreach'ing over it.
--FILE--
<?php

define('MAX_LOOPS',5);

function withRefValue($elements, $transform) {
        echo "\n---( Array with $elements element(s): )---\n";
        //Build array:
        for ($i=0; $i<$elements; $i++) {
                $a[] = "v.$i";
        }
        $counter=0;
        
        $ref = &$a;
        
        echo "--> State of referenced array before loop:\n";
        var_dump($a);
        
        echo "--> Do loop:\n";  
        foreach ($a as $k=>$v) {
                echo "     iteration $counter:  \$k=$k; \$v=$v\n";
                eval($transform);
                $counter++;
                if ($counter>MAX_LOOPS) {
                        echo "  ** Stuck in a loop! **\n";
                        break;
                }
        }
        
        echo "--> State of array after loop:\n";
        var_dump($a);
}


echo "\nPopping elements off end of a referenced array";
$transform = 'array_pop($a);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nShift elements off start of a referenced array";
$transform = 'array_shift($a);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nRemove current element of a referenced array";
$transform = 'unset($a[$k]);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nAdding elements to the end of a referenced array";
$transform = 'array_push($a, "new.$counter");';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nAdding elements to the start of a referenced array";
$transform = 'array_unshift($a, "new.$counter");';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

?>
--EXPECTF--
Popping elements off end of a referenced array
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=0; $v=v.0
     iteration 3:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}



Shift elements off start of a referenced array
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
     iteration 2:  $k=0; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
     iteration 2:  $k=0; $v=v.2
     iteration 3:  $k=0; $v=v.3
--> State of array after loop:
array(0) {
}



Remove current element of a referenced array
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
--> State of array after loop:
array(0) {
}



Adding elements to the end of a referenced array
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(5) "new.0"
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=new.0
     iteration 3:  $k=3; $v=new.1
     iteration 4:  $k=4; $v=new.2
     iteration 5:  $k=5; $v=new.3
  ** Stuck in a loop! **
--> State of array after loop:
array(8) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(5) "new.0"
  [3]=>
  unicode(5) "new.1"
  [4]=>
  unicode(5) "new.2"
  [5]=>
  unicode(5) "new.3"
  [6]=>
  unicode(5) "new.4"
  [7]=>
  unicode(5) "new.5"
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=new.0
     iteration 4:  $k=4; $v=new.1
     iteration 5:  $k=5; $v=new.2
  ** Stuck in a loop! **
--> State of array after loop:
array(9) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(5) "new.0"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.2"
  [6]=>
  unicode(5) "new.3"
  [7]=>
  unicode(5) "new.4"
  [8]=>
  unicode(5) "new.5"
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
     iteration 4:  $k=4; $v=new.0
     iteration 5:  $k=5; $v=new.1
  ** Stuck in a loop! **
--> State of array after loop:
array(10) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
  [4]=>
  unicode(5) "new.0"
  [5]=>
  unicode(5) "new.1"
  [6]=>
  unicode(5) "new.2"
  [7]=>
  unicode(5) "new.3"
  [8]=>
  unicode(5) "new.4"
  [9]=>
  unicode(5) "new.5"
}



Adding elements to the start of a referenced array
---( Array with 1 element(s): )---
--> State of referenced array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(2) {
  [0]=>
  unicode(5) "new.0"
  [1]=>
  unicode(3) "v.0"
}

---( Array with 2 element(s): )---
--> State of referenced array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(8) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
}

---( Array with 3 element(s): )---
--> State of referenced array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(9) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
  [8]=>
  unicode(3) "v.2"
}

---( Array with 4 element(s): )---
--> State of referenced array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(10) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
  [8]=>
  unicode(3) "v.2"
  [9]=>
  unicode(3) "v.3"
}
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.013.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.013.phpt
+++ php-src/tests/lang/foreachLoop.013.phpt
--TEST--
Directly modifying an unreferenced array when foreach'ing over it while using 
&$value syntax.
--FILE--
<?php

define('MAX_LOOPS',5);

function withRefValue($elements, $transform) {
        echo "\n---( Array with $elements element(s): )---\n";
        //Build array:
        for ($i=0; $i<$elements; $i++) {
                $a[] = "v.$i";
        }
        $counter=0;
        
        echo "--> State of array before loop:\n";
        var_dump($a);
        
        echo "--> Do loop:\n";  
        foreach ($a as $k=>&$v) {
                echo "     iteration $counter:  \$k=$k; \$v=$v\n";
                eval($transform);
                $counter++;
                if ($counter>MAX_LOOPS) {
                        echo "  ** Stuck in a loop! **\n";
                        break;
                }
        }
        
        echo "--> State of array after loop:\n";
        var_dump($a);
}


echo "\nPopping elements off end of an unreferenced array, using &\$value.";
$transform = 'array_pop($a);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nShift elements off start of an unreferenced array, using &\$value.";
$transform = 'array_shift($a);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nRemove current element of an unreferenced array, using &\$value.";
$transform = 'unset($a[$k]);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nAdding elements to the end of an unreferenced array, using 
&\$value.";
$transform = 'array_push($a, "new.$counter");';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nAdding elements to the start of an unreferenced array, using 
&\$value.";
$transform = 'array_unshift($a, "new.$counter");';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

?>
--EXPECTF--

Popping elements off end of an unreferenced array, using &$value.
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=0; $v=v.0
     iteration 3:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}



Shift elements off start of an unreferenced array, using &$value.
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
     iteration 2:  $k=0; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=v.1
     iteration 2:  $k=0; $v=v.2
     iteration 3:  $k=0; $v=v.3
--> State of array after loop:
array(0) {
}



Remove current element of an unreferenced array, using &$value.
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
--> State of array after loop:
array(0) {
}



Adding elements to the end of an unreferenced array, using &$value.
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(2) {
  [0]=>
  &unicode(3) "v.0"
  [1]=>
  unicode(5) "new.0"
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=new.0
     iteration 3:  $k=3; $v=new.1
     iteration 4:  $k=4; $v=new.2
     iteration 5:  $k=5; $v=new.3
  ** Stuck in a loop! **
--> State of array after loop:
array(8) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(5) "new.0"
  [3]=>
  unicode(5) "new.1"
  [4]=>
  unicode(5) "new.2"
  [5]=>
  &unicode(5) "new.3"
  [6]=>
  unicode(5) "new.4"
  [7]=>
  unicode(5) "new.5"
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=new.0
     iteration 4:  $k=4; $v=new.1
     iteration 5:  $k=5; $v=new.2
  ** Stuck in a loop! **
--> State of array after loop:
array(9) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(5) "new.0"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  &unicode(5) "new.2"
  [6]=>
  unicode(5) "new.3"
  [7]=>
  unicode(5) "new.4"
  [8]=>
  unicode(5) "new.5"
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
     iteration 4:  $k=4; $v=new.0
     iteration 5:  $k=5; $v=new.1
  ** Stuck in a loop! **
--> State of array after loop:
array(10) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
  [4]=>
  unicode(5) "new.0"
  [5]=>
  &unicode(5) "new.1"
  [6]=>
  unicode(5) "new.2"
  [7]=>
  unicode(5) "new.3"
  [8]=>
  unicode(5) "new.4"
  [9]=>
  unicode(5) "new.5"
}



Adding elements to the start of an unreferenced array, using &$value.
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(2) {
  [0]=>
  unicode(5) "new.0"
  [1]=>
  &unicode(3) "v.0"
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(8) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  &unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(9) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  &unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
  [8]=>
  unicode(3) "v.2"
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=0; $v=new.0
     iteration 2:  $k=0; $v=new.1
     iteration 3:  $k=0; $v=new.2
     iteration 4:  $k=0; $v=new.3
     iteration 5:  $k=0; $v=new.4
  ** Stuck in a loop! **
--> State of array after loop:
array(10) {
  [0]=>
  unicode(5) "new.5"
  [1]=>
  &unicode(5) "new.4"
  [2]=>
  unicode(5) "new.3"
  [3]=>
  unicode(5) "new.2"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.0"
  [6]=>
  unicode(3) "v.0"
  [7]=>
  unicode(3) "v.1"
  [8]=>
  unicode(3) "v.2"
  [9]=>
  unicode(3) "v.3"
}

http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.003.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.003.phpt
+++ php-src/tests/lang/foreachLoop.003.phpt
--TEST--
Foreach loop tests - error case: not an array.
--FILE--
<?php
echo "\nNot an array.\n";
$a = TRUE;
foreach ($a as $v) {
        var_dump($v);
}

$a = null;
foreach ($a as $v) {
        var_dump($v);
}

$a = 1;
foreach ($a as $v) {
        var_dump($v);
}

$a = 1.5;
foreach ($a as $v) {
        var_dump($v);
}

$a = "hello";
foreach ($a as $v) {
        var_dump($v);
}

echo "done.\n";
?>
--EXPECTF--

Not an array.

Warning: Invalid argument supplied for foreach() in %s on line 4

Warning: Invalid argument supplied for foreach() in %s on line 9

Warning: Invalid argument supplied for foreach() in %s on line 14

Warning: Invalid argument supplied for foreach() in %s on line 19

Warning: Invalid argument supplied for foreach() in %s on line 24
done.

http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.001.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.001.phpt
+++ php-src/tests/lang/foreachLoop.001.phpt
--TEST--
Foreach loop tests - basic loop with just value and key => value.
--FILE--
<?php

$a = array("a","b","c");

foreach ($a as $v) {
        var_dump($v);
}
foreach ($a as $k => $v) {
        var_dump($k, $v);
}
//check key and value after the loop.
var_dump($k, $v);

echo "\n";
//Dynamic array
foreach (array("d","e","f") as $v) {
        var_dump($v);
}
foreach (array("d","e","f") as $k => $v) {
        var_dump($k, $v);
}
//check key and value after the loop.
var_dump($k, $v);

echo "\n";
//Ensure counter is advanced during loop
$a=array("a","b","c");
foreach ($a as $v);
var_dump(current($a));
$a=array("a","b","c");
foreach ($a as &$v);
var_dump(current($a));

?>
--EXPECT--
unicode(1) "a"
unicode(1) "b"
unicode(1) "c"
int(0)
unicode(1) "a"
int(1)
unicode(1) "b"
int(2)
unicode(1) "c"
int(2)
unicode(1) "c"

unicode(1) "d"
unicode(1) "e"
unicode(1) "f"
int(0)
unicode(1) "d"
int(1)
unicode(1) "e"
int(2)
unicode(1) "f"
int(2)
unicode(1) "f"

bool(false)
bool(false)
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.009.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.009.phpt
+++ php-src/tests/lang/foreachLoop.009.phpt
--TEST--
Foreach loop tests - foreach operates on the original array if the array is 
referenced outside the loop.
--FILE--
<?php
// From php.net/foreach:
// "Unless the array is referenced, foreach operates on a copy of the specified 
array."

echo "\nRemove elements from a referenced array during loop\n";
$refedArray=array("original.0", "original.1", "original.2");
$ref=&$refedArray;
foreach ($refedArray as $k=>$v1) {
        array_pop($refedArray);
        echo "key: $k; value: $v1\n";
}

echo "\nRemove elements from a referenced array during loop, using &\$value\n";
$refedArray=array("original.0", "original.1", "original.2");
$ref=&$refedArray;
foreach ($refedArray as $k=>&$v2) {
        array_pop($refedArray);
        echo "key: $k; value: $v2\n";
}

echo "\nAdd elements to a referenced array during loop\n";
$refedArray=array("original.0", "original.1", "original.2");
$ref=&$refedArray;
$count=0;
foreach ($refedArray as $k=>$v3) {
        array_push($refedArray, "new.$k");
        echo "key: $k; value: $v3\n";
        
        if ($count++>5) {
                echo "Loop detected, as expected.\n";
                break;
        }
}

echo "\nAdd elements to a referenced array during loop, using &\$value\n";
$refedArray=array("original.0", "original.1", "original.2");
$ref=&$refedArray;
$count=0;
foreach ($refedArray as $k=>&$v4) {
        array_push($refedArray, "new.$k");
        echo "key: $k; value: $v4\n";
        
        if ($count++>5) {
                echo "Loop detected, as expected.\n";
                break;
        }
}

?>
--EXPECT--

Remove elements from a referenced array during loop
key: 0; value: original.0
key: 1; value: original.1

Remove elements from a referenced array during loop, using &$value
key: 0; value: original.0
key: 1; value: original.1

Add elements to a referenced array during loop
key: 0; value: original.0
key: 1; value: original.1
key: 2; value: original.2
key: 3; value: new.0
key: 4; value: new.1
key: 5; value: new.2
key: 6; value: new.3
Loop detected, as expected.

Add elements to a referenced array during loop, using &$value
key: 0; value: original.0
key: 1; value: original.1
key: 2; value: original.2
key: 3; value: new.0
key: 4; value: new.1
key: 5; value: new.2
key: 6; value: new.3
Loop detected, as expected.


http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.006.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.006.phpt
+++ php-src/tests/lang/foreachLoop.006.phpt
--TEST--
Foreach loop tests - error case: key is a reference.
--FILE--
<?php
$a = array("a","b","c");
foreach ($a as &$k=>$v) {
  var_dump($v);
}
?>
--EXPECTF--
Fatal error: Key element cannot be a reference in %s on line 3
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.016.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.016.phpt
+++ php-src/tests/lang/foreachLoop.016.phpt
--TEST--
Ensure foreach splits the iterated entity from its cow reference set, for all 
sorts of iterated entities.
--FILE--
<?php
  error_reporting(E_ALL & ~E_STRICT);

  echo "\n" . '$a' . "\n";
  $b = $a = array('original');
  foreach($a as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '${\'a\'}' . "\n";
  $b = $a = array('original');
  foreach(${'a'} as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '$$a' . "\n";
  $a = 'blah';
  $$a = array('original');
  $b = $$a;
  foreach($$a as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '$a[0]' . "\n";
  $b = $a[0] = array('original');
  foreach($a[0] as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '$a[0][0]' . "\n";
  $b = $a[0][0] = array('original');
  foreach($a[0][0] as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '$a->b' . "\n";
  $b = $a->b = array('original');
  foreach($a->b as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '$a->b->c' . "\n";
  $b = $a->b->c = array('original');
  foreach($a->b as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '$a->b[0]' . "\n";
  $b = $a->b[0] = array('original');
  foreach($a->b[0] as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '$a->b[0][0]' . "\n";
  $b = $a->b[0][0] = array('original');
  foreach($a->b[0][0] as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . '$a->b[0]->c' . "\n";
  $b = $a->b[0]->c = array('original');
  foreach($a->b[0]->c as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  class C {
        public static $a;
  }
  
  echo "\n" . 'C::$a' . "\n";
  C::$a = array('original');
  $b = C::$a;
  foreach(C::$a as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset($a, $b);
  
  echo "\n" . 'C::$a[0]' . "\n";
  C::$a[0] = array('original');
  $b = C::$a[0];
  foreach(C::$a[0] as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset(C::$a[0], $b);
  
  echo "\n" . 'C::$a[0]->b' . "\n";
  C::$a[0]->b = array('original');
  $b = C::$a[0]->b;
  foreach(C::$a[0]->b as $k=>&$v) {
         $v = 'changed';
  }
  var_dump($b);
  unset(C::$a[0]->b, $b);
?>
--EXPECTF--

$a
array(1) {
  [0]=>
  unicode(8) "original"
}

${'a'}
array(1) {
  [0]=>
  unicode(8) "original"
}

$$a
array(1) {
  [0]=>
  unicode(8) "original"
}

$a[0]
array(1) {
  [0]=>
  unicode(8) "original"
}

$a[0][0]
array(1) {
  [0]=>
  unicode(8) "original"
}

$a->b
array(1) {
  [0]=>
  unicode(8) "original"
}

$a->b->c
array(1) {
  [0]=>
  unicode(8) "original"
}

$a->b[0]
array(1) {
  [0]=>
  unicode(8) "original"
}

$a->b[0][0]
array(1) {
  [0]=>
  unicode(8) "original"
}

$a->b[0]->c
array(1) {
  [0]=>
  unicode(8) "original"
}

C::$a
array(1) {
  [0]=>
  unicode(8) "original"
}

C::$a[0]
array(1) {
  [0]=>
  unicode(8) "original"
}

C::$a[0]->b
array(1) {
  [0]=>
  unicode(8) "original"
}
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.010.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.010.phpt
+++ php-src/tests/lang/foreachLoop.010.phpt
--TEST--
This test illustrates the impact of invoking destructors when refcount is 
decremented to 0 on foreach.
It will pass only if the 'contentious code' in PHPValue.decReferences() is 
enabled.
--FILE--
<?php

$a = array(1,2,3);
$container = array(&$a);

// From php.net:  
//   "Unless the array is referenced, foreach operates on a copy of
//    the specified array and not the array itself."
// At this point, the array $a is referenced.

// The following line ensures $a is no longer references as a consequence
// of running the 'destructor' on $container.  
$container = null;

// At this point the array $a is no longer referenced, so foreach should 
operate on a copy of the array.
// However, P8 does not invoke 'destructors' when refcount is decremented to 0.
// Consequently, $a thinks it is still referenced, and foreach will operate on 
the array itself.
// This provokes a difference in behaviour when changing the number of elements 
in the array while
// iterating over it.  

$i=0;
foreach ($a as $v) {
        array_push($a, 'new');
        var_dump($v);
        
        if (++$i>10) {
                echo "Infinite loop detected\n";
                break;
        }
}

?>
--EXPECTF--
int(1)
int(2)
int(3)
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.017.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.017.phpt
+++ php-src/tests/lang/foreachLoop.017.phpt
--TEST--
Ensure foreach works with arrays with Binary keys.
--FILE--
<?php
$a = array ( "\x90" => 10 );
foreach ($a as $val=>$key) echo $key;
echo "\nDone\n";
?> 
--EXPECTF--
10
Done
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.007.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.007.phpt
+++ php-src/tests/lang/foreachLoop.007.phpt
--TEST--
Foreach loop tests - error case: reference to constant array.
--FILE--
<?php
echo "\nReference to constant array\n";
foreach (array(1,2) as &$v) {
  var_dump($v);
}
?>
--EXPECTF--
Parse error: %s on line 3

http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.004.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.004.phpt
+++ php-src/tests/lang/foreachLoop.004.phpt
--TEST--
Foreach loop tests - using an array element as the $value
--FILE--
<?php

$a=array("a", "b", "c");
$v=array();
foreach($a as $v[0]) {
        var_dump($v);
}
var_dump($a);
var_dump($v);

echo "\n";
$a=array("a", "b", "c");
$v=array();
foreach($a as $k=>$v[0]) {
        var_dump($k, $v);
}
var_dump($a);
var_dump($k, $v);
?>
--EXPECT--
array(1) {
  [0]=>
  unicode(1) "a"
}
array(1) {
  [0]=>
  unicode(1) "b"
}
array(1) {
  [0]=>
  unicode(1) "c"
}
array(3) {
  [0]=>
  unicode(1) "a"
  [1]=>
  unicode(1) "b"
  [2]=>
  unicode(1) "c"
}
array(1) {
  [0]=>
  unicode(1) "c"
}

int(0)
array(1) {
  [0]=>
  unicode(1) "a"
}
int(1)
array(1) {
  [0]=>
  unicode(1) "b"
}
int(2)
array(1) {
  [0]=>
  unicode(1) "c"
}
array(3) {
  [0]=>
  unicode(1) "a"
  [1]=>
  unicode(1) "b"
  [2]=>
  unicode(1) "c"
}
int(2)
array(1) {
  [0]=>
  unicode(1) "c"
}
http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.012.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.012.phpt
+++ php-src/tests/lang/foreachLoop.012.phpt
--TEST--
Directly modifying an unreferenced array when foreach'ing over it.
--FILE--
<?php

define('MAX_LOOPS',5);

function withRefValue($elements, $transform) {
        echo "\n---( Array with $elements element(s): )---\n";
        //Build array:
        for ($i=0; $i<$elements; $i++) {
                $a[] = "v.$i";
        }
        $counter=0;
        
        echo "--> State of array before loop:\n";
        var_dump($a);
        
        echo "--> Do loop:\n";  
        foreach ($a as $k=>$v) {
                echo "     iteration $counter:  \$k=$k; \$v=$v\n";
                eval($transform);
                $counter++;
                if ($counter>MAX_LOOPS) {
                        echo "  ** Stuck in a loop! **\n";
                        break;
                }
        }
        
        echo "--> State of array after loop:\n";
        var_dump($a);
}


echo "\nPopping elements off end of an unreferenced array";
$transform = 'array_pop($a);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nShift elements off start of an unreferenced array";
$transform = 'array_shift($a);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nRemove current element of an unreferenced array";
$transform = 'unset($a[$k]);';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nAdding elements to the end of an unreferenced array";
$transform = 'array_push($a, "new.$counter");';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

echo "\n\n\nAdding elements to the start of an unreferenced array";
$transform = 'array_unshift($a, "new.$counter");';
withRefValue(1, $transform);
withRefValue(2, $transform);
withRefValue(3, $transform);
withRefValue(4, $transform);

?>
--EXPECTF--

Popping elements off end of an unreferenced array
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
--> State of array after loop:
array(0) {
}



Shift elements off start of an unreferenced array
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
--> State of array after loop:
array(0) {
}



Remove current element of an unreferenced array
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(0) {
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(0) {
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
--> State of array after loop:
array(0) {
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
--> State of array after loop:
array(0) {
}



Adding elements to the end of an unreferenced array
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(5) "new.0"
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(5) "new.0"
  [3]=>
  unicode(5) "new.1"
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
--> State of array after loop:
array(6) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(5) "new.0"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.2"
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
--> State of array after loop:
array(8) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
  [4]=>
  unicode(5) "new.0"
  [5]=>
  unicode(5) "new.1"
  [6]=>
  unicode(5) "new.2"
  [7]=>
  unicode(5) "new.3"
}



Adding elements to the start of an unreferenced array
---( Array with 1 element(s): )---
--> State of array before loop:
array(1) {
  [0]=>
  unicode(3) "v.0"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
--> State of array after loop:
array(2) {
  [0]=>
  unicode(5) "new.0"
  [1]=>
  unicode(3) "v.0"
}

---( Array with 2 element(s): )---
--> State of array before loop:
array(2) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
--> State of array after loop:
array(4) {
  [0]=>
  unicode(5) "new.1"
  [1]=>
  unicode(5) "new.0"
  [2]=>
  unicode(3) "v.0"
  [3]=>
  unicode(3) "v.1"
}

---( Array with 3 element(s): )---
--> State of array before loop:
array(3) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
--> State of array after loop:
array(6) {
  [0]=>
  unicode(5) "new.2"
  [1]=>
  unicode(5) "new.1"
  [2]=>
  unicode(5) "new.0"
  [3]=>
  unicode(3) "v.0"
  [4]=>
  unicode(3) "v.1"
  [5]=>
  unicode(3) "v.2"
}

---( Array with 4 element(s): )---
--> State of array before loop:
array(4) {
  [0]=>
  unicode(3) "v.0"
  [1]=>
  unicode(3) "v.1"
  [2]=>
  unicode(3) "v.2"
  [3]=>
  unicode(3) "v.3"
}
--> Do loop:
     iteration 0:  $k=0; $v=v.0
     iteration 1:  $k=1; $v=v.1
     iteration 2:  $k=2; $v=v.2
     iteration 3:  $k=3; $v=v.3
--> State of array after loop:
array(8) {
  [0]=>
  unicode(5) "new.3"
  [1]=>
  unicode(5) "new.2"
  [2]=>
  unicode(5) "new.1"
  [3]=>
  unicode(5) "new.0"
  [4]=>
  unicode(3) "v.0"
  [5]=>
  unicode(3) "v.1"
  [6]=>
  unicode(3) "v.2"
  [7]=>
  unicode(3) "v.3"
}

http://cvs.php.net/viewvc.cgi/php-src/tests/lang/foreachLoop.002.phpt?view=markup&rev=1.1
Index: php-src/tests/lang/foreachLoop.002.phpt
+++ php-src/tests/lang/foreachLoop.002.phpt
--TEST--
Foreach loop tests - modifying the array during the loop.
--FILE--
<?php

echo "\nDirectly changing array values.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as $k=>$v) {
        $a[$k]="changed.$k";
        var_dump($v);
}
var_dump($a);

echo "\nModifying the foreach \$value.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as $k=>$v) {
        $v="changed.$k";
}
var_dump($a);


echo "\nModifying the foreach &\$value.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as $k=>&$v) {
        $v="changed.$k";
}
var_dump($a);

echo "\nPushing elements onto an unreferenced array.\n";
$a = array("original.1","original.2","original.3");
$counter=0;
foreach ($a as $v) {
        array_push($a, "new.$counter");

        //avoid infinite loop if test is failing
    if ($counter++>10) {
        echo "Loop detected\n";
        break;          
    }
}
var_dump($a);

echo "\nPushing elements onto an unreferenced array, using &\$value.\n";
$a = array("original.1","original.2","original.3");
$counter=0;
foreach ($a as &$v) {
        array_push($a, "new.$counter");

        //avoid infinite loop if test is failing
    if ($counter++>10) {
        echo "Loop detected\n";
        break;          
    }   
}
var_dump($a);

echo "\nPopping elements off an unreferenced array.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as $v) {
        array_pop($a);
        var_dump($v);   
}
var_dump($a);

echo "\nPopping elements off an unreferenced array, using &\$value.\n";
$a = array("original.1","original.2","original.3");
foreach ($a as &$v) {
        array_pop($a);
        var_dump($v);
}
var_dump($a);

?>
--EXPECT--

Directly changing array values.
unicode(10) "original.1"
unicode(10) "original.2"
unicode(10) "original.3"
array(3) {
  [0]=>
  unicode(9) "changed.0"
  [1]=>
  unicode(9) "changed.1"
  [2]=>
  unicode(9) "changed.2"
}

Modifying the foreach $value.
array(3) {
  [0]=>
  unicode(10) "original.1"
  [1]=>
  unicode(10) "original.2"
  [2]=>
  unicode(10) "original.3"
}

Modifying the foreach &$value.
array(3) {
  [0]=>
  unicode(9) "changed.0"
  [1]=>
  unicode(9) "changed.1"
  [2]=>
  &unicode(9) "changed.2"
}

Pushing elements onto an unreferenced array.
array(6) {
  [0]=>
  unicode(10) "original.1"
  [1]=>
  unicode(10) "original.2"
  [2]=>
  unicode(10) "original.3"
  [3]=>
  unicode(5) "new.0"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.2"
}

Pushing elements onto an unreferenced array, using &$value.
Loop detected
array(15) {
  [0]=>
  unicode(10) "original.1"
  [1]=>
  unicode(10) "original.2"
  [2]=>
  unicode(10) "original.3"
  [3]=>
  unicode(5) "new.0"
  [4]=>
  unicode(5) "new.1"
  [5]=>
  unicode(5) "new.2"
  [6]=>
  unicode(5) "new.3"
  [7]=>
  unicode(5) "new.4"
  [8]=>
  unicode(5) "new.5"
  [9]=>
  unicode(5) "new.6"
  [10]=>
  unicode(5) "new.7"
  [11]=>
  &unicode(5) "new.8"
  [12]=>
  unicode(5) "new.9"
  [13]=>
  unicode(6) "new.10"
  [14]=>
  unicode(6) "new.11"
}

Popping elements off an unreferenced array.
unicode(10) "original.1"
unicode(10) "original.2"
unicode(10) "original.3"
array(0) {
}

Popping elements off an unreferenced array, using &$value.
unicode(10) "original.1"
unicode(10) "original.2"
array(1) {
  [0]=>
  unicode(10) "original.1"
}
-- 
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