PHP | fsockopen() 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 fsockopen() Function.

The built-in fsockopen() function is used for opening the internet or Unix domain socket connections.

Syntax

Following below is the syntax to use this function -

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

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Parameter Details

Sr.No	Parameters & Description
1	hostname ssl:// or tls:// are works over on TCP/IP to connect to the remote host.
2	port The port number. This can be omitted and skipped with -1 for transports that do not use ports, such as unix://.
3	errno It Provides the system level error number
4	errstr The Error message as a string
5	timeout The Connection time Out

Return Value

This built-in function returns a file pointer which may be used together with other file functions. If the call fails, it returns FALSE.

Example

Try out the following example below -

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

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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 gethostbyaddr() Function.

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