Imagecreatefromjpeg returns a black image after resize

Question

I have a script to resize an uploaded image, but when I use it, it just returns a black square. All error messages are pointing at this function:

function resize         


        

Answer 1

According to Marc B's answer you could probably make a check if the file is a JPG file. (JPEG, JPG, jpg, jpeg extensions).

it could be something like:

$file = explode(".", $_POST['file']);
$file_ext = $file[count($file)]; // Get the last thing in the array - in this way the filename can containg dots (.)
$allowed_ext = array('jpg', 'JPG', 'jpeg', 'jpg');

if( in_array($file_ext, $allowed_ext )
{
    // The code for creating the image here.
}