openssl_encrypt Encrypts data &reftitle.description; stringopenssl_encrypt stringdata stringmethod stringpassword intoptions0 stringiv"" Encrypts given data with given method and key, returns a raw or base64 encoded string &warn.undocumented.func; &reftitle.parameters; data The data. method The cipher method. password The password. options options can be one of OPENSSL_RAW_DATA, OPENSSL_ZERO_PADDING. iv A non-NULL Initialization Vector. &reftitle.returnvalues; Returns the encrypted string on success&return.falseforfailure;. &reftitle.errors; Emits an E_WARNING level error if an unknown cipher algorithm is passed in via the method parameter. Emits an E_WARNING level error if an empty value is passed in via the iv parameter. &reftitle.changelog; &Version; &Description; 5.3.3 The iv parameter was added. 5.4.0 The raw_output was changed to options. &reftitle.seealso; openssl_decrypt