From: michel dot lecorsier at orange dot fr
Operating system: Ubuntu
PHP version: 5.4.9
Package: *Programming Data Structures
Bug Type: Bug
Bug description:Operators : == is useless
Description:
------------
== is useless.
Itâs not transitive. "foo" == TRUE, and "foo" == 0⦠but, of course,
TRUE != 0.
== converts to numbers when possible (123 == "123foo"⦠although "123"
!= "123foo"), which means it converts to floats when possible. So large hex
strings (like, say, password hashes) may occasionally compare true when
theyâre not. Even JavaScript doesnât do this.
For the same reason, "6" == " 6", "4.2" == "4.20", and "133" == "0133".
But note that 133 != 0133, because 0133 is octal. But "0x10" == "16" and
"1e3" == "1000"!
=== compares values and type⦠except with objects, where === is only
true if both operands are actually the same object! For objects, ==
compares both value (of every attribute) and type, which is what === does
for every other type. What.
Test script:
---------------
<?php
$toto = "Foo";
if ($toto == "foo")
{
echo 'yes';
exit;
}
else
{
echo 'fail';
exit;
}
--
Edit bug report at https://bugs.php.net/bug.php?id=63599&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=63599&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=63599&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=63599&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=63599&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=63599&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=63599&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=63599&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=63599&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=63599&r=support
Expected behavior: https://bugs.php.net/fix.php?id=63599&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=63599&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=63599&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=63599&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=63599&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=63599&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=63599&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=63599&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=63599&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=63599&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=63599&r=mysqlcfg
