pfsockopen()

pfsockopen() — Open persistent Internet or Unix domain socket connection.

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

This function behaves exactly as fsockopen() with the difference that the connection is not closed after the script finishes. It is the persistent version of fsockopen().

Signature

pfsockopen(string $hostname, int $port = -1, int &$error_code = null, string &$error_message = null, ?float $timeout = null): resource|false

Parameters

This function takes no parameters.

Return value

pfsockopen() returns a file pointer which may be used together with the other file functions (such as fgets(), fgetss(), fwrite(), fclose(), and feof()), or false on failure.

Example

The PHP manual ships no example for pfsockopen(); the signature and the parameter table above are the contract.

Changelog

See also

fsockopen()

All PHP 8.5 built-in functions

Reference card built from the PHP manual page pfsockopen() (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.