(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)
mcrypt_module_close — Closes the mcrypt module
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.
mcrypt_module_close ( resource $td ) : bool
Closes the specified encryption handle.
td
The encryption descriptor.
Returns true on success or false on failure.
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https://www.php.net/manual/en/function.mcrypt-module-close.php