mcrypt_module_self_test

This function runs a self test on the specified module

Warning

This function has been DEPRECATED as of PHP 7.1.0 and REMOVED as of PHP 7.2.0. Relying on this function is highly discouraged.

bool mcrypt_module_self_test(string $algorithm, string $lib_dir = ?)

This function runs the self test on the algorithm specified.

algorithm: One of the MCRYPT_ciphername constants, or the name of the algorithm as string.
lib_dir: The optional lib_dir parameter can contain the location where the algorithm module is on the system.

The function returns true if the self test succeeds, or false when it fails.

Example #1 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));
?>

The above example will output:

bool(true)
bool(false)