PHP Curl function Exec_ch and get_headers

Yesterday, in the project, someone is judging whether a video under YouTube can be played, write down the following code:
  　　　　　　 $request _url= ' http://youtube.com/get_video_info?video_id= '.$vid. ' &el=vevo&fmt=18&asv=2&hd=1 '; $ch=Curl_init (); curl_setopt ($ch, Curlopt_url,$request _url); curl_setopt ($ch, Curlopt_returntransfer, 1); curl_setopt ($ch, Curlopt_connecttimeout, 10); curl_setopt ($ch, Curlopt_followlocation,True); $data= Curl_exec ($ch); Curl_close ($ch); unset($ch); if($data===false) {                $this->deletevideo ($video[' ID ']); Echo"Program:".$vid. "Program ID".$video[' ID ']. "Invalid, delete. \ n"; Continue; }            Parse_str($data,$details); unset($data); if(!isset($details[' Url_encoded_fmt_stream_map ']) ||Empty($details[' Url_encoded_fmt_stream_map '])) {                $this->deletevideo ($video[' ID ']); Echo"Program:".$vid. "Program ID".$video[' ID ']. "Invalid, delete. \ n"; Continue; }            $newstr=Explode(",",$details[' Url_encoded_fmt_stream_map ']); $str 1=Explode("&",$newstr[0]); $obj=Array();  for($j= 0;$j<Count($str 1);$j++) {                $str 2=Explode("=",$str 1[$j]); if(!isset($obj[$str 2[0]])) {                    $obj[$str 2[0]] =$str 2[1]; }            }            $ary _re[' source_url '] =UrlDecode($obj[' URL ']); if(Empty($ary _re[' Source_url ']) || !isset($ary _re[' Source_url '])) {                $this->deletevideo ($video[' ID ']); Echo"Program:".$vid. "Program ID".$video[' ID ']. "Invalid, delete. \ n"; Continue; } Else {                $bool=$this->getmobilecurl ($ary _re[' Source_url ']);//not able to play                if($bool===false) {                    $this->deletevideo ($video[' ID ']); Echo"Program:".$vid. "Program ID".$video[' ID ']. "Invalid, delete. \ n"; Continue; }            }            $right _nums++;

The functions of Getmobilecurl are defined as follows:

$ch=Curl_init (); curl_setopt ($ch, Curlopt_url,$request _url); curl_setopt ($ch, Curlopt_returntransfer, 1); curl_setopt ($ch, Curlopt_connecttimeout, 10); curl_setopt ($ch, Curlopt_followlocation,True); $data= Curl_exec ($ch); Curl_close ($ch); unset($ch); if($data===false) {                return false             }

Use Curl_exec to determine if the current connection can play, and there is a problem:

Prompt for memory overflow!

I specifically debug a bit, found that the $data data accounted for a large amount of memory, open the $request_url, that is, YouTube video of the actual playing address, only to find that the video is HD 1080P, and is 1 hours of length, this only to find the problem is the cause of the $ Data this is the content of the video, so it overflows,

Decisively the Getmobilecurl function is processed to obtain the server's response header information:

functionGetmobilecurl ($url)    {        $res=get_headers($url, 1); $response _status=$res[0]; if(Strpos($response _status, "200")!==false||Strpos($response _status, "302")!==false||Strpos($response _status, "301")!==false) {            return true; } Else {            return false; }    }

Problem solving:

When using the Curl function for crawler processing, pay attention to whether the target is a video, files and other relatively large goals, as well as their own needs.

PHP Curl function Exec_ch and get_headers