Ubuntu
php5 package

PHP Comparison Issues ... 0 equates to 'D'

Bug #928550 reported by LaChild
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
php5 (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

Hello,

Using "PHP 5.3.6-13ubuntu3.3 with Suhosin-Patch (cli)" I noticed the following bug. Apparently the (integer) 0 equates to the same thing as (string) 'D'

Example:
----------------------------------------------
<?php
$test = 'D';

if ($test == 'D')
echo 'true'; // Echos true

$testZero = 0;

if ($testZero == 'D')
echo 'true'; //Also echos true
----------------------------------------------

Both equate to "true" but the 0 should not.

Thanks,
LaChild

Tags: php php5
Revision history for this message
Steve Beattie (sbeattie) wrote :

Thanks for taking the time to report this issue and help improve Ubuntu. While from a programmer's perspective, it's unexpected behavior; however, it is correct as documented at:

  http://php.net/manual/en/language.operators.comparison.php

What's happening is that when comparing a string to a number, php is converting the string (in this case 'D') to a number. Because 'D' isn't a (base 10) number, it treats it as the number 0. And thus 0 == 0 returns true.

Please feel free to report any additional issues you come across. Thanks again!

Changed in php5 (Ubuntu):
status: New → Invalid
Revision history for this message
LaChild (shafer-w2002) wrote :

Wow, thanks.... Guess I just never hit this one before... I wonder how many bugs are in my scripts because of this... doh!

Thanks for the quick the reply.

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