openssl_encrypt Encrypts data &reftitle.description; stringfalseopenssl_encrypt #[\SensitiveParameter]stringdata stringcipher_algo #[\SensitiveParameter]stringpassphrase intoptions0 stringiv"" stringtag&null; stringaad"" inttag_length16 Encrypts given data with given method and passphrase, returns a raw or base64 encoded string &reftitle.parameters; data The plaintext message data to be encrypted. cipher_algo The cipher method. For a list of available cipher methods, use openssl_get_cipher_methods. passphrase The passphrase. If the passphrase is shorter than expected, it is silently padded with NUL characters; if the passphrase is longer than expected, it is silently truncated. There is no key derivation function used for passphrase as its name might suggest. The only operation used is padding with NUL characters or truncation if the length is different than expected. options options is a bitwise disjunction of the flags OPENSSL_RAW_DATA, and OPENSSL_ZERO_PADDING or OPENSSL_DONT_ZERO_PAD_KEY. iv A non-&null; Initialization Vector. If the IV is shorter than expected, it is padded with NUL characters and warning is emitted; if the passphrase is longer than expected, it is truncated and warning is emitted. tag The authentication tag passed by reference when using AEAD cipher mode (GCM or CCM). aad Additional authenticated data. tag_length The length of the authentication tag. Its value can be between 4 and 16 for GCM mode. &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 cipher_algo parameter. Emits an E_WARNING level error if an empty value is passed in via the iv parameter. &reftitle.changelog; &Version; &Description; 7.1.0 The tag, aad and tag_length parameters were added. &reftitle.examples; ]]> ]]> &reftitle.seealso; openssl_decrypt