照片方向调整

image-orientation.php

<?php
function adjustPicOrientation($full_filename, $type = 'jpeg'){        
    $exif = exif_read_data($full_filename);
    if($exif && isset($exif['Orientation'])) {
        $orientation = $exif['Orientation'];
        if($orientation != 1){
            if($type == 'jpeg'){
                $img = imagecreatefromjpeg($full_filename);
            } else if($type == 'png') {
                $img = imagecreatefrompng($full_filename);
            }

            $mirror = false;
            $deg    = 0;

            switch ($orientation) {
              case 2:
                $mirror = true;
                break;
              case 3:
                $deg = 180;
                break;
              case 4:
                $deg = 180;
                $mirror = true;  
                break;
              case 5:
                $deg = 270;
                $mirror = true; 
                break;
              case 6:
                $deg = 270;
                break;
              case 7:
                $deg = 90;
                $mirror = true; 
                break;
              case 8:
                $deg = 90;
                break;
            }
            if ($deg) $img = imagerotate($img, $deg, 0);
            if($type == 'jpeg'){
                imagejpeg($img, $full_filename);
            } else if($type == 'png') {
                imagepng($img, $full_filename);
            }
            imagedestroy($img);
        }
    }
    return $full_filename;
}