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Mcrypt Functions	Last updated: Mon, 26 Oct 2026

mcrypt_module_close

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

mcrypt_module_close — Closes the mcrypt module

Warning

This function has been DEPRECATED as of PHP 7.1.0 and REMOVED as of PHP 7.2.0. Relying on this function is highly discouraged.

function mcrypt_module_close(resource $td): bool

Closes the specified encryption handle.

Returns true on success or false on failure.