[PHP-DEV] PHP 4.0 Bug #9481 Updated: Passing out class property by reference problem
ID: 9481
Updated by: stas
Reported By: [EMAIL PROTECTED]
Old-Status: Open
Status: Closed
Bug Type: Scripting Engine problem
Assigned To:
Comments:
This is not a bug. Please read the "References explained"
part in the manual. When you have $a = $b and you do $a =
$c, you don't make a and b be references to c, you make only
$a bound to $c and unbound from $b. So when you did $refObj
= $this-sValue
$refObj stopped being reference to call parameter and
became reference to $this-sValue. There's no real way to
make "other" referenced value to be rebound to some new value.
Previous Comments:
---
[2001-02-27 10:42:34] [EMAIL PROTECTED]
?
function xmpdump($xValue, $sLabel="")
{
echo "$sLabelxmp";
var_dump($xValue);
echo "/xmp";
}
class test
{
var $sValue;
var $Count = 0;
function getTest($refObj)
{
if (isset($this-sValue))
{
$refObj = $this-sValue;
xmpdump($refObj, "Reference before being passed
back");
return;
}
else
{
$refObj = "phil".$this-Count;
$this-Count++;
$this-sValue = $refObj;
xmpdump($refObj, "Value before being passed back");
return;
}
}
}
$tst = new test();
$tst-getTest($tstObj0);
xmpdump($tstObj0, "Value after being passed back");
$tst-getTest($tstObj1);
xmpdump($tstObj1, "Refence after being passed back");
?
The dump of $tstObj1 is NULL, despite the dump of $refObj immediately before it in the
function working correctly.
---
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[PHP-DEV] PHP 4.0 Bug #9481 Updated: Passing out class property by reference problem
ID: 9481
User Update by: [EMAIL PROTECTED]
Status: Closed
Bug Type: Scripting Engine problem
Description: Passing out class property by reference problem
You can get round the above problem somewhat using:
function foo ($aVar)
{
$aVar['value'] = $GLOBALS["baz"];
}
foo($bar);
$bar['value'] is now a reference to $GLOBALS["baz"] as you would expect.
Previous Comments:
---
[2001-03-08 06:58:36] [EMAIL PROTECTED]
This is not a bug. Please read the "References explained"
part in the manual. When you have $a = $b and you do $a =
$c, you don't make a and b be references to c, you make only
$a bound to $c and unbound from $b. So when you did $refObj
= $this-sValue
$refObj stopped being reference to call parameter and
became reference to $this-sValue. There's no real way to
make "other" referenced value to be rebound to some new value.
---
[2001-02-27 10:42:34] [EMAIL PROTECTED]
?
function xmpdump($xValue, $sLabel="")
{
echo "$sLabelxmp";
var_dump($xValue);
echo "/xmp";
}
class test
{
var $sValue;
var $Count = 0;
function getTest($refObj)
{
if (isset($this-sValue))
{
$refObj = $this-sValue;
xmpdump($refObj, "Reference before being passed
back");
return;
}
else
{
$refObj = "phil".$this-Count;
$this-Count++;
$this-sValue = $refObj;
xmpdump($refObj, "Value before being passed back");
return;
}
}
}
$tst = new test();
$tst-getTest($tstObj0);
xmpdump($tstObj0, "Value after being passed back");
$tst-getTest($tstObj1);
xmpdump($tstObj1, "Refence after being passed back");
?
The dump of $tstObj1 is NULL, despite the dump of $refObj immediately before it in the
function working correctly.
---
Full Bug description available at: http://bugs.php.net/?id=9481
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