Mcrypt Functions
PHP Manual

mcrypt_enc_self_test

Runs a self test on the opened module

Warning

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

Description

int mcrypt_enc_self_test ( resource $td )

This function runs the self test on the algorithm specified by the descriptor td.

Parameters

td

The encryption descriptor.

Return Values

If the self test succeeds it returns FALSE. In case of an error, it returns TRUE.