openssl_cipher_iv_length
PHP 5 >= 5.3.3, PHP 7, PHP 8
openssl_cipher_iv_length - Gets the cipher iv length
Manual
openssl_cipher_iv_length(
string$cipher_algo ): int|false
Gets the cipher initialization vector (iv) length.
Parameters
- cipher_algo
-
The cipher method, see openssl_get_cipher_methods for a list of potential values.
Return Values
Returns the cipher length on success, or false on failure.
Exceptions and Errors
Emits an E_WARNING level error when the cipher algorithm is unknown.