getimagesize() is not working with PNG images having HTTPS

Question

i have this image:

  $imgurl = 'https://www.danmurphys.com.au/media/DM/Product/308x385/913411_0_9999_med_v1_m56577569854513142.png';

I have tried these both codes

1. $image = @getimagesize($imgurl);
   print_r($image);
   

Gives no result.

See 2nd case below starts with function getRanger

2. public static function getRanger($url){
       $headers = array(
       "Range: bytes=0-327680"
       );
   
       $curl = curl_init($url);
       curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
       curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
       $data = curl_exec($curl);
       curl_close($curl);
       return $data;
   }
   
   $raw    = self::getRanger($imgurl);
   $im     = imagecreatefromstring($raw);
   
   $width  = imagesx($im);
   $height = imagesy($im);
   
   echo $width;
   echo $height;
   

Both gives me empty result. can some of you can help me.

Thanks in advance.

Answer 1

2nd one is nearly there.

I am quite sure that calling

echo curl_error($curl);

after curl's execution will give you: SSL certificate problem: unable to get local issuer certificate

Basically there are two ways to fix this -

Proper way

download cacert.pem file from https://curl.haxx.se/docs/caextract.html, save it somewhere where your script can reach it and add following line before curl_exec(); call

    // Add certification atuhority info
    curl_setopt($curl, CURLOPT_CAINFO, './path/to/cacert.pem'); 

Note, this won't work with self-signed SSL Certificates

Quick fix

You might want to make SSL checks 'loose'.

    // disable SSL checks
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);

Note, this method will work even with self-signed SSL Certificates, but doing so is considered insecure.