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Bug #14605 compare string with integer 0 returns t
Submitted: 2001-12-19 11:11 UTC Modified: 2001-12-19 11:24 UTC
From: adrian at ciutureanu dot ro Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 4.1.0 OS: Windows NT 4 sp 6a
Private report: No CVE-ID: None
View Developer Edit
 [2001-12-19 11:11 UTC] adrian at ciutureanu dot ro 
<?php
	$i = 0;
	$s = 'the string';
	if($i == $s) {
		echo "'$s' == $i";
	} else {
		echo "'$s' != $i";
	}
?>
// This outputs 'the string' == 0

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 [2001-12-19 11:21 UTC] jan@php.net 
this i due to the autoconversation of variables in PHP. Your string is converted into an integer during the comparison.The integer is 0, since no fitting value can be found. 
So 0 equals 0.
 [2001-12-19 11:24 UTC] derick@php.net 
Use === instead of ==

Derick
 
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