How to detect faulty JPEG in PHP Issue with SOFn DQT or DHT JPEG marker missing before a JPEG SOS marker

Question

Is there a way to detect if an image has corrupt metadata in PHP?

Scenario:  I have a JPEG file that seems to have some corrupt metadata, which causes problems for some software platforms. For example, when I try to load it with Adobe software I get this error: "Could not complete your request because a SOFn, DQT or DHT JPEG marker is missing before a JPEG SOS marker". However, the image looks fine in a browser, or in Microsoft Paint! My first suspicion was that it wasn't really a JPEG file, but the MIME-type is JPEG and the image data is JPEG according to various online tools.

In PHP I can create a new un-corrupt JPEG with the following code:

$bad_img = imagecreatefromjpeg($file);
list($w, $h, $type) = getimagesize($file);
$new_img = imagecreatetruecolor($w, $h);
imagecopyresampled($new_img, $bad_img, 0, 0, 0, 0, $w, $h, $w, $h);

I want to use this code only if the image is corrupted so is there a way to know that?

Answer 1

Use getimagesize() it will return FALSE if file corrupt otherwise if file is ok then it will return array containing file info like mime, height and width etc, try below example:

<?php
  $fileName = 'image/corruptsample.jpg'; //filepath
  if(getimagesize($fileName) === false){
    echo "file is corrupted";
  }
  else{
    echo "file is ok";
  }

I hope this helps you.