(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)
mcrypt_module_self_test — This function runs a self test on the specified module
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.
mcrypt_module_self_test ( string $algorithm [, string $lib_dir ] ) : bool
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)
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https://www.php.net/manual/en/function.mcrypt-module-self-test.php