How to check/fix image rotation before upload image using PHP

Question

I have a issiue when uploading a image taken using iphone. I am trying to use PHP and the imgrotate function to automaticly decide if the image needs to be rotated to the co

Answer 1

You are using imagerotate wrong. It expect first parameter to be resource while you are passing the filename. Check manual

Try this:

<?php

$filename = $_FILES['file']['name'];
$filePath = $_FILES['file']['tmp_name'];
$exif = exif_read_data($_FILES['file']['tmp_name']);
if (!empty($exif['Orientation'])) {
    $imageResource = imagecreatefromjpeg($filePath); // provided that the image is jpeg. Use relevant function otherwise
    switch ($exif['Orientation']) {
        case 3:
        $image = imagerotate($imageResource, 180, 0);
        break;
        case 6:
        $image = imagerotate($imageResource, -90, 0);
        break;
        case 8:
        $image = imagerotate($imageResource, 90, 0);
        break;
        default:
        $image = $imageResource;
    } 
}

imagejpeg($image, $filename, 90);

?>

Do not forget to free the memory by adding following two lines:

imagedestroy($imageResource);
imagedestroy($image);