Simple if statement returning unexpected results

[eluser]John_Betong[/eluser]
 
I looked again in the PHP Manual for Comparison Operators and found this explanation and example:

$a === $b Identical TRUE if $a is equal to $b, and they are of the same type. (introduced in PHP 4)

Also

If you compare an integer with a string, the string is converted to a number.
If you compare two numerical strings, they are compared as integers.

<?php

var_dump(0 == "a"); // 0 == 0 -> true
var_dump("1" == "01"); // 1 == 1 -> true
var_dump("1" == "1e0"); // 1 == 1 -> true

?>