php发送get、post请求的几种方法

方法1: 用file_get_contents 以get方式获取内容

 <?php
 $url='http://www.domain.com/';
 $html = file_get_contents($url);
 echo $html;
 ?>  

方法2: 用fopen打开url, 以get方式获取内容

 <?php
 $fp = fopen($url, 'r');
 //返回请求流信息（数组：请求状态，阻塞，返回值是否为空，返回值http头等） 

 stream_get_meta_data($fp);  

 while(!feof($fp)) {
 $result .= fgets($fp, 1024);
 }
 echo "url body: $result";
 fclose($fp);
 ?>
  

方法3：用file_get_contents函数,以post方式获取url

 //生成url-encode后的请求字符串，将数组转换为字符串
 $data = http_build_query($data);
 $opts = array (
 <span style="white-space:pre">  </span>'http' => array (
 <span style="white-space:pre">      </span>'method' => 'POST',
 <span style="white-space:pre">      </span>'header'=> "Content-type: application/x-www-form-urlencoded\r\n" .
 <span style="white-space:pre">      </span>"Content-Length: " . strlen($data) . "\r\n",
 <span style="white-space:pre">      </span>'content' => $data
 <span style="white-space:pre">  </span>)
 ); 

 //生成请求的句柄文件
 $context = stream_context_create($opts);
 $html = file_get_contents('http://localhost/e/admin/test.html', false, $context);
 echo $html;
 ?>  

方法4：用fsockopen函数打开url，以get方式获取完整的数据，包括header和body,fsockopen需要 PHP.ini 中 allow_url_fopen 选项开启

 <?php
 function get_url ($url,$cookie=false)
 {
 $url = parse_url($url);
 $query = $url[path]."?".$url[query];
 echo "Query:".$query;
 $fp = fsockopen( $url[host], $url[port]?$url[port]:80 , $errno, $errstr, 30);
 if (!$fp) {
 return false;
 } else {
 $request = "GET $query HTTP/1.1\r\n";
 $request .= "Host: $url[host]\r\n";
 $request .= "Connection: Close\r\n";
 if($cookie) $request.="Cookie:   $cookie\n";
 $request.="\r\n";
 fwrite($fp,$request);
 while()) {
 $result .= @fgets($fp, 1024);
 }
 fclose($fp);
 return $result;
 }
 }
 //获取url的html部分，去掉header
 function GetUrlHTML($url,$cookie=false)
 {
 $rowdata = get_url($url,$cookie);
 if($rowdata)
 {
 $body= stristr($rowdata,"\r\n\r\n");
 $body=substr($body,4,strlen($body));
 return $body;
 }
     return false;
 }
 ?>  

方法5：用fsockopen函数打开url，以POST方式获取完整的数据，包括header和body

方法6:使用curl库，使用curl库之前，可能需要查看一下php.ini是否已经打开了curl扩展

 <?php
 $ch = curl_init();
 $timeout = 5;
 curl_setopt ($ch, CURLOPT_URL, 'http://www.domain.com/');
 curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
 $file_contents = curl_exec($ch);
 curl_close($ch);
 echo $file_contents;
 ?>