How to send post request in php

This article mainly introduces three methods for PHP to send post requests. Curl, file_get_content, and fsocket are used to implement post submission data. Friends in need can refer to it.

Related recommendations: "php Getting Started Tutorial"

Method 1: file_get_content version

/**
 * 发送post请求
 * @param string $url 请求地址
 * @param array $post_data post键值对数据
 * @return string
 */
function send_post($url, $post_data) {
  
  $postdata = http_build_query($post_data);
  $options = array(
    'http' => array(
      'method' => 'POST',
      'header' => 'Content-type:application/x-www-form-urlencoded',
      'content' => $postdata,
      'timeout' => 15 * 60 // 超时时间（单位:s）
    )
  );
  $context = stream_context_create($options);
  $result = file_get_contents($url, false, $context);
  
  return $result;
}
  
//使用方法
$post_data = array(
  'username' => 'stclair2201',
  'password' => 'handan'
);
send_post('http://www.jb51.net', $post_data);

Recommended manual: PHP complete self-study manual

Method 2: Socket version

<?php
/**
 * Socket版本
 * 使用方法：
 * $post_string = "app=socket&version=beta";
 * request_by_socket(&#39;chajia8.com&#39;, &#39;/restServer.php&#39;, $post_string);
 */
function request_by_socket($remote_server,$remote_path,$post_string,$port = 80,$timeout = 30) {
  $socket = fsockopen($remote_server, $port, $errno, $errstr, $timeout);
  if (!$socket) die("$errstr($errno)");
  fwrite($socket, "POST $remote_path HTTP/1.0");
  fwrite($socket, "User-Agent: Socket Example");
  fwrite($socket, "HOST: $remote_server");
  fwrite($socket, "Content-type: application/x-www-form-urlencoded");
  fwrite($socket, "Content-length: " . （strlen($post_string) + 8） . "");
  fwrite($socket, "Accept:*/*");
  fwrite($socket, "");
  fwrite($socket, "mypost=$post_string");
  fwrite($socket, "");
  $header = "";
  while ($str = trim(fgets($socket, 4096))) {
    $header .= $str;
  }
  
  $data = "";
  while (!feof($socket)) {
    $data .= fgets($socket, 4096);
  }
  
  return $data;
}
?>

Method 3: Curl version

<?php
/**
 * Curl版本
 * 使用方法：
 * $post_string = "app=request&version=beta";
 * request_by_curl(&#39;http://www.jb51.net/restServer.php&#39;, $post_string);
 */
function request_by_curl($remote_server, $post_string) {
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $remote_server);
  curl_setopt($ch, CURLOPT_POSTFIELDS, &#39;mypost=&#39; . $post_string);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_USERAGENT, "jb51.net&#39;s CURL Example beta");
  $data = curl_exec($ch);
  curl_close($ch);
  
  return $data;
}
?>

Recommended related articles:
1.Summary of examples of using the POST() method in php
2.Three common uses of php to simulate post requests
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