php发送post请求的三种方法

方法一：

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('https://www.jb51.net', $post_data);

方法二：Socket版本

下面是其他网友的方法：

class Request{
  public static function post($url, $post_data = '', $timeout = 5){//curl
    $ch = curl_init();
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_POST, 1);
    if($post_data != ''){
      curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
    }
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
    curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    curl_setopt($ch, CURLOPT_HEADER, false);
    $file_contents = curl_exec($ch);
    curl_close($ch);
    return $file_contents;
  }
  public static function post2($url, $data){//file_get_content
    
    $postdata = http_build_query(
      $data
    );
    
    $opts = array('http' =>
    array(
      'method' => 'POST',
      'header' => 'Content-type: application/x-www-form-urlencoded',
      'content' => $postdata
    )
    );
    
    $context = stream_context_create($opts);
    $result = file_get_contents($url, false, $context);
    return $result;
  }
  public static function post3($host,$path,$query,$others=''){//fsocket
    $post="POST $path HTTP/1.1rnHost: $hostrn";
    $post.="Content-type: application/x-www-form-";
    $post.="urlencodedrn${others}";
    $post.="User-Agent: Mozilla 4.0rnContent-length: ";
    $post.=strlen($query)."rnConnection: closernrn$query";
    $h=fsockopen($host,80);
    fwrite($h,$post);
    for($a=0,$r='';!$a;){
 $b=fread($h,8192);
 $r.=$b;
 $a=(($b=='')?1:0);
      }
    fclose($h);
    return $r;
  }
}

大家可以根据需要选择适合自己的即可。