mcrypt_ecb Encrypt/decrypt data in ECB mode stringmcrypt_ecb intcipher stringkey stringdata intmode stringmcrypt_ecb stringcipher stringkey stringdata intmode stringiv The first prototype is when linked against libmcrypt 2.2.x, the second when linked against libmcrypt 2.4.x or higher. This function should not be used anymore, see mcrypt_generic and mdecrypt_generic for replacements.