getservbyport()
getservbyport() — Get Internet service which corresponds to port and protocol.
Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.
What it does
getservbyport() returns the Internet service associated with port for the specified protocol as per /etc/services.
Signature
getservbyport(int $port, string $protocol): string|false
Parameters
| Parameter | Type | What it takes |
|---|---|---|
| $port | int | The port number. |
| $protocol | string | protocol is either "tcp" or "udp" (in lowercase). |
Return value
Returns the Internet service name as a string, or false on failure.
Example
The PHP manual ships no example for getservbyport(); the signature and the parameter table above are the contract.
See also
All PHP 8.5 built-in functions
Reference card built from the PHP manual page getservbyport() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.