This function deinitializes an encryption module mcrypt_encrypt mcrypt_generic_end Mcrypt Functions PHP Manual mcrypt_generic_deinit (PHP 4 >= 4.0.7, PHP 5)mcrypt_generic_deinit — This function deinitializes an encryption module Description bool mcrypt_generic_deinit ( resource $td ) This function terminates encryption specified by the encryption descriptor (td ). It clears all buffers, but does not close the module. You need to call mcrypt_module_close() yourself. (But PHP does this for you at the end of the script.) Returns FALSE on error, or TRUE on success. See for an example mcrypt_module_open() and the entry on mcrypt_generic_init(). mcrypt_encrypt mcrypt_generic_end Mcrypt Functions PHP Manual