HTTP中的表单请求的三种方式

1.file_get_contents/fopen方式

<?php

     $postData = array(

          //构造的数据

     );

$postData = http_build_query($postData);//处理引号相连

     $opts = array(

         'http'=>array(

         'method'=>"POST",

         'header'=>"Host:localhost\r\n".

                   "Content-type:application/x-www-form-urlencodeed\r\n".

                   "Content-length:".strlen($postData)."\r\n",

         'content' => $postData,

     $context = stream_context_create( $opts );

     1 . file_get_contents( http://xxxx/xxxx/xxxx.php,false,$context);

     2. $fp = fopen("http://xxx","r",false,$context);

         $fclose = fclose($fp);

2.CURL方式(需要开启扩展)
//1.开启会话     返回资源句柄

$ch = curl_init();

//2.会话传输选项设置

curl_setopt($ch,CURLOPT_URL,$url) //设置提交的网址

curl_setopt($ch,CURLOPT_POST,1)//设置数据提交方式

curl_setopt($ch,CURLOPT_POSTFIELDS,$postData)//设置提交的数据

curl_setopt($ch,CURLOPT_RETURNTRANSFER,1)//提交之后,把数据返回为字符串

//3.执行会话

$output = curl_exec($ch);

//4.关闭会话

curl_close($ch);

3.SOCKET方式

<?php

$postData =array();

$postData = http_build_query($postData);

$fp = fsocketopen("localhost",80,$errno,$errorStr,5);

$request = "POST http://xxx HTTP/1.1\r\n ";

$request .= "Host:localhost\r\n";

$request .= "Content-type:application/x-www-form-urlencode\r\n";

$request .="Content-length:".strlen($postData)."\r\n\r\n";

$request .=$postData;

fwrite($fp,$request);

//想把请求数据读出来

while(!feof($fp)){

     echo fget($fp,1024);

}

fclose($fp);