mcrypt_enc_self_test
    (PHP 4 >= 4.0.2, PHP 5)
mcrypt_enc_self_test -- This function runs a self test on the opened module
Description
int 
mcrypt_enc_self_test ( resource td )
     This function runs the self test on the algorithm specified by the
     descriptor td. If the self test succeeds it returns FALSE. In case
     of an error, it returns TRUE.