How to use PHP's network functions?

How to use network functions in PHP?

PHP provides a powerful collection of network functions that allow developers to easily create web applications, handle HTTP requests, and communicate with web servers. This guide will introduce PHP's most important networking functions and provide practical examples to illustrate their use.

Get network function

• file_get_contents(): Get the contents of the file, and can also be used to get the Web page.

  $html = file_get_contents('https://www.example.com');

• curl_init(): Initialize a cURL session for performing complex requests.

  $ch = curl_init('https://www.example.com');
  curl_exec($ch);

Post network function

• ##http_post_fields(): Submit data to in Post mode remote server.

  $data = ['name' => 'John Doe', 'email' => 'johndoe@example.com'];
  $opts = ['http' => ['method' => 'POST', 'header' => 'Content-type: application/x-www-form-urlencoded', 'content' => http_build_query($data)]];
  $context = stream_context_create($opts);
  file_get_contents('https://www.example.com/submit.php', false, $context);

Parse HTTP response

• ##http_response_code()

  : Get the HTTP response code, indicating The status of the request. <pre class='brush:php;toolbar:false;'>$response_code = http_response_code(); if ($response_code !== 200) { throw new Exception(&quot;HTTP Error: $response_code&quot;); }</pre>

• json_decode()

  : Decode a JSON response into a PHP object or associative array. <pre class='brush:php;toolbar:false;'>$json = file_get_contents('https://www.example.com/api/users.json'); $users = json_decode($json);</pre>

Other useful network functions

socket_create()
• : Create a network socket with to connect to the server.
socket_connect()
• : Connect the socket to the specified remote address and port.
socket_write()
• : Write data to the socket.
socket_read()
• : Read data from the socket.

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