Rotate jpg according to exif

rotate-jpg.php

<?php

function rotate_jpg($filename)
{
  if (exif_imagetype($filename) == IMAGETYPE_JPEG)
  {
    $image = imagecreatefromjpeg($filename);
    $image = imagerotate($image, array_values([0, 0, 0, 180, 0, 0, -90, 0, 90])[@exif_read_data($filename)['Orientation'] ?: 0], 0);
    imagejpeg($image, $filename, 100);
  }
}