Curl Image using php but empty file is created

//Init curl
$ch = curl_init ($url);

//Required to be false
curl_setopt($ch, CURLOPT_HEADER, 0);

//Required for http(s)
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

//Required to be true
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);

//Response data
$rawdata=curl_exec($ch);

//close
curl_close ($ch);

Ref:

https://stackoverflow.com/questions/34036579/curl-image-using-php-but-empty-file-is-created