openssl_cipher_iv_length

Function • Params and return types changed in PHP 8.0

Gets the cipher iv length.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

`openssl_cipher_iv_length` Function synopsis

openssl_cipher_iv_length(string $cipher_algo): int|false

Parameters

`$cipher_algo`

Typestring

The cipher method, see openssl_get_cipher_methods for a list of potential values.

Return value

Typeint|false

Returns the cipher length on success, or false on failure.

Changes to the `openssl_cipher_iv_length` Function

PHP 8.0

Return type added: int|false
Parameter name of parameter #1 changed: $method to $cipher_algo
Parameter type added for parameter #1 ($cipher_algo): string

- openssl_cipher_iv_length($method)
+ openssl_cipher_iv_length(string $cipher_algo): int|false

`openssl_cipher_iv_length` Function Availability

PHP Version	Availability
PHP 8.6Upcoming Release	Yes
PHP 8.5Supported (Latest)	Yes
PHP 8.4Supported	Yes
PHP 8.3Security-Fixes Only	Yes
PHP 8.2Security-Fixes Only	Yes
PHP 8.1Unsupported	Yes
PHP 8.0Unsupported	Yes
PHP 7.4Unsupported	Yes
PHP 7.3Unsupported	Yes
PHP 7.2Unsupported	Yes
PHP 7.1Unsupported	Yes
PHP 7.0Unsupported	Yes
PHP 5.6Unsupported	Yes
PHP 5.5Unsupported	Yes
PHP 5.4Unsupported	Yes
PHP 5.3Unsupported	Yes