I changed php (current CVS) to add another magic method to Objects,
__toString(). Whenever an object needs to be converted to a string, then it
will first try to call __toString() and if it can't, then it will just
return "Object" like now.
Please look over my patch and see if I did it correctly, and could someone
please put it in cvs? If someone will include this in CVS I will followup
with __toDouble() and __toLong() and __toBoolean() and __toArray()
My goal is to make Objects more useful as regular data types. For example I
could introduce a new Class called Date which would act just like a string
in all string contexts and act just like a number of seconds from 1970 in
numeric contexts.
I have one thing that is confusing to me, look at this test script:
<?php
class foo {
var $fooval;
function foo() {
$this->fooval="foofoo";
}
}
class bar extends foo {
function __toString() {
return 5;
}
}
class baz extends foo {
function __toString() {
return $this->fooval;
}
}
echo "<br><br><br><br>\n";
$foo=new foo();
$bar=new bar();
$baz=new baz();
var_dump(5);
var_dump(strval(5));
echo "print_r(\$foo): "; print_r($foo); echo "<br>\n";
echo "\$foo: ", $foo, "<br>\n";
echo "strval(\$foo): ", strval($foo), "<br>\n";
echo "var_dump(strval(\$foo)): "; var_dump(strval($foo)); echo "<br>\n";
echo "print_r(strval(\$foo)): "; print_r(strval($foo)); echo "<br>\n";
echo "print_r(\$bar): "; print_r($bar); echo "<br>\n";
echo "\$bar: ", $bar, "<br>\n";
echo "strval(\$bar): ", strval($bar), "<br>\n";
echo "var_dump(strval(\$bar)): "; var_dump(strval($bar)); echo "<br>\n";
echo "print_r(strval(\$bar)): "; print_r(strval($bar)); echo "<br>\n";
echo "print_r(\$baz): "; print_r($baz); echo "<br>\n";
echo "\$baz: ", $baz, "<br>\n";
echo "strval(\$baz): ", strval($baz), "<br>\n";
echo "var_dump(strval(\$baz)): "; var_dump(strval($baz)); echo "<br>\n";
echo "print_r(strval(\$baz)): "; print_r(strval($baz)); echo "<br>\n";
?>
Everything works as expected except for the var_dump and print_r calls.
Here is the output:
Notice the the print_r calls are showing the whole object and not just the
strval.
int(5) string(1) "5" print_r($foo): foo Object ( [fooval] => foofoo )
$foo:
Warning: Object to string conversion in c:\inetpub\wwwroot\default.php on
line 37
Object
strval($foo):
Warning: Object to string conversion in c:\inetpub\wwwroot\default.php on
line 38
Object
var_dump(strval($foo)):
Warning: Object to string conversion in c:\inetpub\wwwroot\default.php on
line 39
string(6) "Object"
print_r(strval($foo)):
Warning: Object to string conversion in c:\inetpub\wwwroot\default.php on
line 40
Object
print_r($bar): bar Object ( [fooval] => foofoo )
$bar: 5
strval($bar): 5
var_dump(strval($bar)): object(bar)(1) { ["fooval"]=> string(6) "foofoo" }
print_r(strval($bar)): bar Object ( [fooval] => foofoo )
print_r($baz): baz Object ( [fooval] => foofoo )
$baz: foofoo
strval($baz): foofoo
var_dump(strval($baz)): object(baz)(1) { ["fooval"]=> string(6) "foofoo" }
print_r(strval($baz)): baz Object ( [fooval] => foofoo )
begin 666 foo.txt
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`
end
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