php curl Obtains the content of https page and does not directly output the setting method of returning results

Using php curl to get page content or submit data, you sometimes want the returned content to be stored as a variable rather than output directly.

Method: Set the CURLOPT_RETURNTRANSFER option for curl to 1 or true.

eg:

$url = 'http://www.baidu.com';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
//  Don't http header  Accelerate efficiency 
curl_setopt($curl, CURLOPT_HEADER, 0);
// https Request   Do not verify certificates and hosts
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$res = curl_exec($ch); // Content has been obtained , Not output to page .
curl_close($ch);