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PHP | pfsockopen() Function

PHP pfsockopen() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP pfsockopen() Function.

The built-in pfsockopen() function opens a persistent internet or Unix domain socket connection.

Note: This function is almost identical to the fsockopen() function. The difference is that the connection is not closed after the script finishes. This built-in PHP function is the persistent version fsockopen() function.


Following below is the syntax to use this function -

resource pfsockopen ( string $hostname [, int $port = -1 [, int &$errno 
   [, string &$errstr [, float $timeout = ini_get("default_socket_timeout") ]]]] )

Parameter Details

Sr.NoParameters & Description


It contains the host name information.



It contains the port number.



It provides the system level of error information.



It contains error message as a string



It contains the connection time out information.

Return Value

If connection is successful this function may return fgets(), fgetss(), fwrite(), fclose(), and feof() or else it returns false in case of failure.


Try out the following example below -

   $open = fsockopen("www.webdesigntutorialz.com", 80, $errno, $errstr, 30);
   if (!$open) {
      echo "$errstr ($errno)
   } else {
   $out = "GET / HTTP/1.1\r\n";
   $out .= "Host: www.webdesigntutorialz.com\r\n";
   $out .= "Connection: Close\r\n\r\n";
   fwrite($open, $out);
   while (!feof($open)) {
      echo fgets($open, 128);


Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will study about the PHP setcookie() Function.

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Thanks for reading and bye for now.

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