mcrypt_module_open – Opening Encryption Algorithm and Mode Modules in PHP
The article explains the PHP function mcrypt_module_open, detailing its purpose of opening encryption algorithm and mode modules, describing each of its four parameters, default directory behaviors, and the return value indicating success with a resource or failure with FALSE.
The mcrypt_module_open function opens a module that corresponds to a specific encryption algorithm and mode in PHP.
It accepts four string parameters: $algorithm (the algorithm name or MCRYPT_ciphername constant), $algorithm_directory (the path to the algorithm module; if empty, the value from php.ini or libmcrypt’s compiled path is used), $mode (the mode name or MCRYPT_MODE constant such as "ecb", "cbc", "cfb", "ofb", "nofb", or "stream"), and $mode_directory (the path to the mode module; if empty, the value from php.ini or libmcrypt’s compiled path is used).
On success, the function returns a resource representing the encryption descriptor; on error it returns FALSE .
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