Question

I found the following function searching SO

function grab_image($url,$saveto){
    $ch = curl_init ($url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
    $raw=curl_exec($ch);
    curl_close ($ch);
    if(file_exists($saveto)){
        unlink($saveto);
    }
    $fp = fopen($saveto,'x');
    fwrite($fp, $raw);
    fclose($fp);
}

this should work to save an image but how can i check the image dimensions, size and filetype first in order to validate that its valid?

Answer 1

before you fire the curl, you can read the image directly using

$url = 'http://exmaple.com/img/some.png';
$imgInfo = getimagesize($url);
print_r($imgInfo);