20c02-1.php

介绍PHP5的给类型函数应用

<?php
// Assume that we have been given the following password:
$password = 'bob123xy';

// Now encrypt this password, we will not provide the optional second
// parameter to specify a 'salt' or 'seed' for the encryption, since the
// specifics can vary per system, easiest to leave it blank.
$enc = crypt($password);

// Now, let's assume that we've just been given a password as part of a login
// Let's try to recrypt it to match.  This time pass the encrypted version as
// the 'salt' so that it can generate it again.  The original salt is saved 
// as part of the encryption process. -- This should echo GOOD.
if (crypt($password, $enc) == $enc) {
	echo 'GOOD';
} else {
	echo 'FAILED';
}
?>