Open persistent Internet or Unix domain socket connection

# pfsockopen

(PHP 4, PHP 5, PHP 7, PHP 8)

pfsockopen — Open persistent Internet or Unix domain socket connection

### Description

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

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().

### Parameters

For parameter information, see the fsockopen() documentation.

### Return Values

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.

### Changelog

Version | Description
--- | ---
8.0.0 | `timeout` is nullable now.

### See Also

- fsockopen() - Open Internet or Unix domain socket connection

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