PHP模拟POST的步骤

function post_url($url, $post = "", $host = "www.ydtuiguang.com", $referrer = 'http://www.ydtuiguang.com/', $proxy = -1){
    if(function_exists("curl_init")){
        $ch = @curl_init();
        @curl_setopt($ch, CURLOPT_URL, $url);
        if(!empty($proxy["address"]))
            @curl_setopt($ch, CURLOPT_PROXY, strpos($proxy["address"], "http") === 0 ? $proxy["address"] : "http://".$proxy["address"]);
        if(!empty($proxy["account"]) && !empty($proxy["password"]))
            @curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxy["account"].":".$proxy["password"]);
        @curl_setopt($ch, CURLOPT_REFERER, $referrer);
        @curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.0)");
        @curl_setopt($ch, CURLOPT_COOKIEJAR, COOKIE_FILE_PATH);
        @curl_setopt($ch, CURLOPT_COOKIEFILE, COOKIE_FILE_PATH);
        @curl_setopt($ch, CURLOPT_HEADER, 0);
        @curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        @curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        @curl_setopt($ch, CURLOPT_TIMEOUT, 1000);
        if (!empty($post)) {
            @curl_setopt($ch, CURLOPT_POST, 1);
            @curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
        }
        $result = @curl_exec($ch);
        @curl_close($ch);
    }elseif(function_exists("fsockopen")){
        $httpheader = "POST ".$url." HTTP/1.1\r\n";   
        $httpheader .= "Accept: */*\r\n";   
        $httpheader .= "Accept-Language: zh-cn\r\n";   
        $httpheader .= "Referer: ".$referrer."\r\n";   
        $httpheader .= "Content-Type: application/x-www-form-urlencoded\r\n";   
        $httpheader .= "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n";   
        $httpheader .= "Host: ".$host."\r\n";   
        $httpheader .= "Content-Length: ".strlen($post)."\r\n";   
        $httpheader .= "Connection: Keep-Alive\r\n";   
        $httpheader .= "\r\n";   
        $httpheader .= $post;   
        $fd = fsockopen($host, 80);   
        fwrite($fd, $httpheader);   
        $result = "";   
        while(!feof($fd)){   
            $result .= fread($fd, 8192);   
        }   
        fclose($fd);   
    }elseif(function_existes('file_get_contents')){
        $httpheader = "POST ".$url." HTTP/1.1\r\n";   
        $httpheader .= "Accept: */*\r\n";   
        $httpheader .= "Accept-Language: zh-cn\r\n";   
        $httpheader .= "Referer: ".$referrer."\r\n";   
        $httpheader .= "Content-Type: application/x-www-form-urlencoded\r\n";   
        $httpheader .= "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n";   
        $httpheader .= "Host: ".$host."\r\n";   
        $httpheader .= "Content-Length: ".strlen($post)."\r\n";   
        $httpheader .= "Connection: Keep-Alive\r\n";   
        
        $opts = array(
           'http'=>array(
                'method'=>"POST",
                'header'=>$httpheader,
                'content'=>$post
           )
         );            
        $context = stream_context_create($opts);
        $result = file_get_contents($url, 'r', $context);
    }
    return $result;
}
<br><font color="#e78608">------解决方案--------------------</font><br><fieldset><legend>探讨</legend><br><br>后台模拟 哪种都差不多 最常用的curl模块<br>                     </fieldset>