# mcrypt_module_is_block_algorithm

(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_module_is_block_algorithm — This function checks whether the specified algorithm is a block algorithm

Advertencia

Esta función ha sido declarada OBSOLETA a partir de PHP 7.1.0 y será ELIMINADA a partir de PHP 7.2.0. Su uso está totalmente desaconsejado.

### Descripción

mcrypt_module_is_block_algorithm(string `$algorithm`, string `$lib_dir` = ?): bool

This function returns `true` if the specified algorithm is a block algorithm, or `false` if it is a stream one.

### Parámetros

`algorithm`

  The algorithm to check.

`lib_dir`

  The optional `lib_dir` parameter can contain the location where the algorithm module is on the system.

### Valores devueltos

This function returns `true` if the specified algorithm is a block algorithm, or `false` if it is a stream one.