mcrypt_module_self_test

This function runs a self test on the specified module (PHP 4 >= 4.0.2, PHP 5)
bool mcrypt_module_self_test ( string algorithm [, string lib_dir] )

This function runs the self test on the algorithm specified. The optional lib_dir parameter can contain the location of where the algorithm module is on the system.

The function returns TRUE if the self test succeeds, or FALSE when if fails.

例 1103. mcrypt_module_self_test() example

<?php
var_dump
(mcrypt_module_self_test(MCRYPT_RIJNDAEL_128)) . "\n";
var_dump(mcrypt_module_self_test(MCRYPT_BOGUS_CYPHER));
?>

上例将输出:

bool(true)
bool(false)