openssl_cipher_key_length

Function • Added in PHP 8.2

Gets the cipher key length.

PHP 5

PHP 7

PHP 8.0-8.1

Added

PHP 8.3

PHP 8.4

PHP 8.5

PHP 8.6

`openssl_cipher_key_length` Function synopsis

openssl_cipher_key_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_key_length` Function

PHP 8.2

Function added

`openssl_cipher_key_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	No
PHP 8.0Unsupported	No
PHP 7.4Unsupported	No
PHP 7.3Unsupported	No
PHP 7.2Unsupported	No
PHP 7.1Unsupported	No
PHP 7.0Unsupported	No
PHP 5.6Unsupported	No
PHP 5.5Unsupported	No
PHP 5.4Unsupported	No
PHP 5.3Unsupported	No