What are the best practices for handling image orientation in PHP when images are uploaded from mobile devices?

When images are uploaded from mobile devices, they may have different orientations due to the device's orientation sensor. To handle this in PHP, you can use the exif_read_data function to check the image's orientation and then rotate it accordingly using the GD library. By checking the orientation and rotating the image if needed, you can ensure that all uploaded images are displayed correctly. 

// Get the image orientation using exif data
$exif = exif_read_data($imagePath);
$orientation = isset($exif['Orientation']) ? $exif['Orientation'] : 0;

// Rotate the image based on orientation
switch ($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;
}

// Save the rotated image
imagejpeg($image, $rotatedImagePath);
imagedestroy($image);

Keywords

image orientation mobile devices PHP exif image manipulation

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