How to send HTTP request through socket in PHP

This article mainly introduces how sockets in PHP send HTTP requests. Interested friends can refer to it. I hope it will be helpful to everyone.

socket method：

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
//socket_set_option($socket, SOL_SOCKET, SO_SNDTIMEO, array("sec"=>20, "usec"=>0));
socket_connect($socket, 'www.baidu.com', 80);
//里面的换行代表 \r\n 注意拷贝的代码后面可能有空格
$http = <<

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

##stream Method (get): 
$http = <<array(
        'header' => $http,
        'timeout'=>1, //超时 秒
        'method' => 'GET', //默认方式
　　　　　　　　　'protocol_version' => '1.1', //默认为 1.0
    ),
);
$context = stream_context_create($hdrs);
echo file_get_contents('http://www.baidu.com', 0, $context);


stream method post:
$postdata = http_build_query(array('act'=>'save', 'id'=>387171));
$http = <<array(
        'header' => $http,
        'timeout'=>1, //超时 秒
        'method' => 'POST',
        'content' => $postdata,
　　　　　　　　　'protocol_version' => '1.1', //默认为 1.0
    ),
);
$context = stream_context_create($hdrs);
echo file_get_contents('http://test.cm/song.php', 0, $context);


Note: The Host header must be included in http1.1, but it does not need to be included in http1.0

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study. 
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