PHP read_exif_data and Adjust Orientation

Question

I am using the following code to rotate an uploaded jpeg image if the orientation is off. I am only having problems with images uploaded from iPhones and Android.

if(move_uploaded_file($_FILES['photo']['tmp_name'], $upload_path . $newfilename)){
            chmod($upload_path . $newfilename, 0755);
            $exif = exif_read_data($upload_path . $newfilename);
            $ort = $exif['IFD0']['Orientation'];
            switch($ort)
            {

                case 3: // 180 rotate left
                    $image->imagerotate($upload_path . $newfilename, 180, -1);
                    break;


                case 6: // 90 rotate right
                    $image->imagerotate($upload_path . $newfilename, -90, -1);
                    break;

                case 8:    // 90 rotate left
                    $image->imagerotate($upload_path . $newfilename, 90, -1);
                    break;
            }
            imagejpeg($image, $upload_path . $newfilename, 100);
            $success_message = 'Photo Successfully Uploaded';
        }else{
            $error_count++;
            $error_message = 'Error: Upload Unsuccessful<br />Please Try Again';
        }

Am I doing something wrong with the way I am reading the EXIF data from the jpeg? It is not rotating the images as it is supposed to.

This is what happens when I run a var_dump($exif);

array(41) {
    ["FileName"]=> string(36) "126e7c0efcac2b76b3320e6187d03cfd.JPG"
    ["FileDateTime"]=> int(1316545667)
    ["FileSize"]=> int(1312472)
    ["FileType"]=> int(2)
    ["MimeType"]=> string(10) "image/jpeg"
    ["SectionsFound"]=> string(30) "ANY_TAG, IFD0, THUMBNAIL, EXIF"
    ["COMPUTED"]=> array(8) {
        ["html"]=> string(26) "width="2048" height="1536""
        ["Height"]=> int(1536)
        ["Width"]=> int(2048)
        ["IsColor"]=> int(1)
        ["ByteOrderMotorola"]=> int(1)
        ["ApertureFNumber"]=> string(5) "f/2.8"
        ["Thumbnail.FileType"]=> int(2)
        ["Thumbnail.MimeType"]=> string(10) "image/jpeg" }
        ["Make"]=> string(5) "Apple"
        ["Model"]=> string(10) "iPhone 3GS"
        ["Orientation"]=> int(6)
        ["XResolution"]=> string(4) "72/1"
            ["YResolution"]=> string(4) "72/1" ["ResolutionUnit"]=> int(2) ["Software"]=> string(5) "4.3.5" ["DateTime"]=> string(19) "2011:09:16 21:18:46" ["YCbCrPositioning"]=> int(1) ["Exif_IFD_Pointer"]=> int(194) ["THUMBNAIL"]=> array(6) { ["Compression"]=> int(6) ["XResolution"]=> string(4) "72/1" ["YResolution"]=> string(4) "72/1" ["ResolutionUnit"]=> int(2) ["JPEGInterchangeFormat"]=> int(658) ["JPEGInterchangeFormatLength"]=> int(8231) } ["ExposureTime"]=> string(4) "1/15" ["FNumber"]=> string(4) "14/5" ["ExposureProgram"]=> int(2) ["ISOSpeedRatings"]=> int(200) ["ExifVersion"]=> string(4) "0221" ["DateTimeOriginal"]=> string(19) "2011:09:16 21:18:46" ["DateTimeDigitized"]=> string(19) "2011:09:16 21:18:46" ["ComponentsConfiguration"]=> string(4) "" ["ShutterSpeedValue"]=> string(8) "3711/949" ["ApertureValue"]=> string(9) "4281/1441" ["MeteringMode"]=> int(1) ["Flash"]=> int(32) ["FocalLength"]=> string(5) "77/20" ["SubjectLocation"]=> array(4) { [0]=> int(1023) [1]=> int(767) [2]=> int(614) [3]=> int(614) } ["FlashPixVersion"]=> string(4) "0100" ["ColorSpace"]=> int(1) ["ExifImageWidth"]=> int(2048) ["ExifImageLength"]=> int(1536) ["SensingMethod"]=> int(2) ["ExposureMode"]=> int(0) ["WhiteBalance"]=> int(0) ["SceneCaptureType"]=> int(0) ["Sharpness"]=> int(1) }

Answer 1

Based on Daniel's code I wrote a function that simply rotates an image if necessary, without resampling.

GD

function image_fix_orientation(&$image, $filename) {
    $exif = exif_read_data($filename);

    if (!empty($exif['Orientation'])) {
        switch ($exif['Orientation']) {
            case 3:
                $image = imagerotate($image, 180, 0);
                break;

            case 6:
                $image = imagerotate($image, -90, 0);
                break;

            case 8:
                $image = imagerotate($image, 90, 0);
                break;
        }
    }
}

One line version (GD)

function image_fix_orientation(&$image, $filename) {
    $image = imagerotate($image, array_values([0, 0, 0, 180, 0, 0, -90, 0, 90])[@exif_read_data($filename)['Orientation'] ?: 0], 0);
}

ImageMagick

function image_fix_orientation($image) {
    if (method_exists($image, 'getImageProperty')) {
        $orientation = $image->getImageProperty('exif:Orientation');
    } else {
        $filename = $image->getImageFilename();

        if (empty($filename)) {
            $filename = 'data://image/jpeg;base64,' . base64_encode($image->getImageBlob());
        }

        $exif = exif_read_data($filename);
        $orientation = isset($exif['Orientation']) ? $exif['Orientation'] : null;
    }

    if (!empty($orientation)) {
        switch ($orientation) {
            case 3:
                $image->rotateImage('#000000', 180);
                break;

            case 6:
                $image->rotateImage('#000000', 90);
                break;

            case 8:
                $image->rotateImage('#000000', -90);
                break;
        }
    }
}

Answer 2

Here I'am explaining the whole thing, I use Laravel and use the Image Intervention Package.

First of all, I get my image and send it to my another function for resizing and some other functionality, if we do not need this, you can skip...

Grab the file with a method in my controller,

 public  function getImageFile(Request $request){
    $image = $request->image;
    $this->imageUpload($image);
}

Now, I send it to resize and getting the image name and extension...

public function  imageUpload($file){
    ini_set('memory_limit', '-1');
    $directory = 'uploads/';
    $name = str_replace([" ", "."], "_", $file->getClientOriginalName()) . "_";
    $file_name = $name . time() . rand(1111, 9999) . '.' . $file->getClientOriginalExtension();
    //path set
    $img_url = $directory.$file_name;
    list($width, $height) = getimagesize($file);
    $h = ($height/$width)*600;
    Image::make($file)->resize(600, $h)->save(public_path($img_url));
    $this->image_fix_orientation($file,$img_url);
    return $img_url;
}

Now I call my image orientation function,

 public function image_fix_orientation($file,$img_url ) {
    $data = Image::make($file)->exif();
    if (!empty($data['Orientation'])) {
        $image = imagecreatefromjpeg($file);
        switch ($data['Orientation']) {
            case 3:
                $image = imagerotate($image, 180, 0);
                break;

            case 6:
                $image = imagerotate($image, -90, 0);
                break;

            case 8:
                $image = imagerotate($image, 90, 0);
                break;
        }

        imagejpeg($image, $img_url, 90);
    }

}

And That's all...

Answer 3

jhead -autorot jpegfile.jpg

Is also a useful way to approach this.

jhead is a standard program in Linux (use 'sudo apt-get install jhead' to install), this option looks at the orientation and rotates the image correctly and losslessly only if it requires. It then also updates the EXIF data correctly.

In this way you can process a jpeg (or multiple jpegs in a folder) in a simple one-pass way that fixes rotation issues permanently.

E.g: jhead -autorot *.jpg will fix a whole folder of jpeg images in just the manner the OP requires in the initial question.

While it's not technically PHP I did read this thread and then used my jhead suggestion instead, called from a PHP system() call to achieve the results I was after which were coincident with the OPs: to rotate images so any software (like 'fbi' in Raspbian) could display them correctly.

In light of this I thought others may benefit from knowing how easily jhead solves this problem and posted the information here only for informative purposes - because no one had mentioned it previously.

Answer 4

Just in case someone comes across this. From what I can make out some of the switch statements above are wrong.

Based on information here, it should be:

switch ($exif['Orientation']) {
    case 3:
        $image = imagerotate($image, -180, 0);
        break;
    case 6:
        $image = imagerotate($image, 90, 0);
        break;
    case 8:
        $image = imagerotate($image, -90, 0);
        break;
}