getprotobynumber

Function • Params and return types changed in PHP 8.0

Get protocol name associated with protocol number.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

`getprotobynumber` Function synopsis

getprotobynumber(int $protocol): string|false

Parameters

`$protocol`

Typeint

The protocol number.

Return value

Typestring|false

Returns the protocol name as a string, or false on failure.

Changes to the `getprotobynumber` Function

PHP 8.0

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

- getprotobynumber($proto)
+ getprotobynumber(int $protocol): string|false

`getprotobynumber` 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