PHP mcrypt_generic() Function for Data Encryption
The article explains PHP's mcrypt_generic() function, detailing its purpose for encrypting data, required parameters ($td as the encryption descriptor and $data as the plaintext), the need for block-size-aligned input, initialization and cleanup steps, and the nature of its returned encrypted output.
mcrypt_generic() is a PHP function used to encrypt data using a previously initialized encryption descriptor.
The function takes two parameters: $td , a resource representing the encryption descriptor initialized via mcrypt_generic_init() , and $data , the string data to be encrypted. The input data length must be a multiple of the block size; otherwise it should be padded with "\0".
It returns the encrypted data, which may be longer than the input due to padding.
Before calling mcrypt_generic() , initialize the encryption handle with mcrypt_generic_init() ; after encryption, clean up with mcrypt_generic_deinit() . See also mcrypt_module_open() for opening the module.
Function signature:
string mcrypt_generic(resource $td, string $data)Laravel Tech Community
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