php - Download a image from SSL using curl? -

how download image curl (https site)?

file saved on computer why blank (0kb)?

function save_image($img,$fullpath){     $ch = curl_init ($img);     curl_setopt($ch, curlopt_header, 1);     curl_setopt($ch, curlopt_returntransfer, 0);     curl_setopt($ch, curlopt_binarytransfer,1);     curl_setopt ($ch, curlopt_followlocation, 0);      $rawdata=curl_exec($ch);     curl_close ($ch);      $fp = fopen($fullpath,'w');     fwrite($fp, $rawdata);     fclose($fp); }  save_image("https://domain.com/file.jpg","image.jpg"); 

curl_setopt($ch, curlopt_returntransfer, 0); 

should be:

curl_setopt($ch, curlopt_returntransfer, 1); 

so curl knows should return data , not echo out.

additionally, have more work ssl certs accepted curl:
using curl in php access https (ssl/tls) protected sites

edit:

given usage, should set curlopt_header false alix axel recommended.

in terms of ssl, hope you'll take time read link suggested, there few different ways handle ssl, , fix alix recommended may ok if data isn't sensitive, negate security, forces curl accept server certs.