php http请求

1: 用file_get_contents 以get方式获取内容：

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

如需设置超时时间，需添加条件配置，如下设置0.01秒超时

$url='http://www.baidu.com';$opts = array('http'=>array('method'=>"GET",'timeout'=>0.01,));$context = stream_context_create($opts);$html = file_get_contents($url,false,$context);echo $html

POST方式

<?php$data = array ('foo' => 'bar');$data = http_build_query($data);$opts = array ( 'http' => array (  'method' => 'POST',  'header' => 'Content-type: application/x-www-form-urlencodedrn Content-Length: '.strlen($data).'rn',  'content' => $data,  'timeout' => 5 ));$context = stream_context_create($opts);$html = file_get_contents('http://www.baidu.com', false, $context);echo $html;

2: 用fopen打开url, 以get方式获取内容：

<?php$url='http://www.baidu.com';$fp = fopen($url,'r');stream_get_meta_data($fp);while(!feof($fp)){$result.= fgets($fp, 1024);}echo "url body: $result";fclose($fp);

3: curl：

$url = '';$data = array('a'=> 'b');$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_POST, true);curl_setopt($ch, CURLOPT_POSTFIELDS, $data);$ret = curl_exec($ch);curl_close($ch);主要说下这个选项CURLOPT_RETURNTRANSFER：如果设置为true/1，则curl_exec的时候不会自动将请求网页的内容输出到屏幕，$ret为请求网页的内容，如果设置为false/0，则curl_exec的时候会自动将请求网页的内容输出到屏幕，此时如果请求成功的话$ret的内容是1或者true。

下面是上传本地文件的代码

$url = '';$file = '1.jpg';$field['uploadFile'] = '@'.$file;（uploadFile为接收端的name名）$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_POST, 1);curl_setopt($ch, CURLOPT_POSTFIELDS, $field);$ret = curl_exec($ch);curl_close($ch);

3: fsockopen：

$uploadInfo = array(                'host'=>'',                'port'=>'80',                'url'=>'/upload.php'        );$fp = fsockopen($uploadInfo['host'],$uploadInfo['port'],$errno,$errstr);$file = '1.jpg';$content = file_get_contents($file);$boundary = md5(time());out.="--".$boundary."\r\n";$out.="Content-Disposition: form-data; name=\"uploadFile\"; filename=\"".$file."\"\r\n";$out.="Content-Type: image/jpg\r\n\r\n";$out.=$content."\r\n";$out.="--".$boundary."\r\n";fwrite($fp,"POST ".$uploadInfo['url']." HTTP/1.1\r\n");fwrite($fp,"Host:".$uploadInfo['host']."\r\n");fwrite($fp,"Content-Type: multipart/form-data; boundary=".$boundary."\r\n");fwrite($fp,"Content-length:".strlen($out)."\r\n\r\n");fwrite($fp,$out);while (!feof($fp)){       $ret .= fgets($fp, 1024);}fclose($fp);$ret = trim(strstr($ret, "\r\n\r\n"));preg_match('/http:.*/', $ret, $match);return $match[0];

简要说明：代码第二行是你的IP地址或域名，第四行是你要POST的页面的具体地址，本例用的是fsock.php，fsock.php内容如下：

<?php     echo "username:".$_POST['username']."<br/>";     echo "password:".$_POST['password']; ?> 

结果为：

username:demopassword:hahaha

伪造post,get方法

<?php//fsocket模拟post提交$purl = "http://localhost/netphp/test2.php?uu=rrrrrrrrrrrr";print_r(parse_url($url));sock_post($purl,"uu=55555555555555555");//fsocket模拟get提交function sock_get($url, $query){   $info = parse_url($url);   $fp = fsockopen($info["host"], 80, $errno, $errstr, 3);   $head = "GET ".$info['path']."?".$info["query"]." HTTP/1.0rn";   $head .= "Host: ".$info['host']."rn";   $head .= "rn";   $write = fputs($fp, $head);   while (!feof($fp))   {    $line = fread($fp,4096);    echo $line;   }}sock_post($purl,"uu=rrrrrrrrrrrrrrrr");function sock_post($url, $query){   $info = parse_url($url);   $fp = fsockopen($info["host"], 80, $errno, $errstr, 3);   $head = "POST ".$info['path']."?".$info["query"]." HTTP/1.0rn";   $head .= "Host: ".$info['host']."rn";   $head .= "Referer: http://".$info['host'].$info['path']."rn";   $head .= "Content-type: application/x-www-form-urlencodedrn";   $head .= "Content-Length: ".strlen(trim($query))."rn";   $head .= "rn";   $head .= trim($query);   $write = fputs($fp, $head);   while (!feof($fp))   {    $line = fread($fp,4096);    echo $line;   }}?>