Description
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.
    
     
| Example 1. mcrypt_module_self_test() example | 
<?phpvar_dump(mcrypt_module_self_test(MCRYPT_RIJNDAEL_128)) . "\n";
 var_dump(mcrypt_module_self_test(MCRYPT_BOGUS_CYPHER));
 ?>
 | 
 The above example will output: |