为什么crypt（）结果不匹配？

Question

So basically here's the deal - I've been working on a user creation script that uses php crypt, but I've been having some issues with comparative tests.

Any thoughts?

EDIT:

<?php

$pw = 'jason';
$pw2 = 'jason';

$p1 = crypt($pw);
$p2 = crypt($pw2);

if($p1 != $p2){

        echo "oh shoot";

}else{

echo "verified";


}


?>

And this consistently replies "oh shoot" indicating that the two outputs do not match.

Answer 1

You should read the function string crypt ( string $str [, string $salt ] ) in php manual crypt

If no salt is provided, PHP will auto-generate either a standard two character (DES) salt, or a twelve character (MD5), depending on the availability of MD5 crypt().

If not provided, one will be randomly generated by PHP each time you call this function. So when you called crypt twice, different results returned.