ID: 20842
Updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
-Status: Open
+Status: Feedback
Bug Type: Documentation problem
Operating System: Any
PHP Version: 4.2.3
New Comment:
Can you be more precise about what comparison operations you have in
mind? Remember that PHP is not OOP, it is a language that supports
OOP-style coding, so there is no inherent way of checking if 2
different instances of objects are of the same class w/ the same
properties, or two variables pointing to the same object instance.
The following code generates the expected result:
function bool2str($bool) {
if ($bool === false) {
return 'FALSE';
} else {
return 'TRUE';
}
}
class Foo {
var $flag;
function Foo($flag=true) {
$this->flag = $flag;
}
}
$o = new Foo();
$p = new Foo(false);
$q = new Foo();
// this should be true
echo bool2str($o == $q)."\n";
// this should be false
echo bool2str($o != $q)."\n";
// this should be true
echo bool2str($o === $q)."\n";
// this should be false
echo bool2str($o == $p)."\n";
// this should be false
echo bool2str($o === $p)."\n";
// this should be true
echo bool2str($o != $p)."\n";
// this should be true
echo bool2str($o !== $p)."\n";
Previous Comments:
------------------------------------------------------------------------
[2002-12-05 16:22:03] [EMAIL PROTECTED]
I cannot find any explanation of object copying or comparison in the
PHP manual (or in the user comments).
Even a note saying "don't expect comparison operators to work on
objects" would by useful -- it would have saved me a couple of days of
debugging and rewriting code.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=20842&edit=1
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