openssl_cipher_iv_length
Gets the cipher iv length
Description
int openssl_cipher_iv_length
( string $method
)
Parameters
-
method
-
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.
Errors/Exceptions
Emits an E_WARNING level error when the cipher algorithm
is unknown.
Examples
Example #1 openssl_cipher_iv_length example
<?php
$method = 'AES-128-CBC';
$ivlen = openssl_cipher_iv_length($method);
echo $ivlen;
?>
The above example will output
something similar to: