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php 画像向き修正

Posted at
image.php
$filename = "パス"

if (mime_content_type($filename) == 'image/jpeg') {
         $image = ImageCreateFromJPEG($filename);
       }else {
         $image = ImageCreateFromPNG($filename);
       }


       $exif_datas = @exif_read_data($filename);
       if (isset($exif_datas['Orientation'])) {
         $orientation = $exif_datas['Orientation'];
       
         //回転角度
         $degrees = 0;
         switch($orientation) {
           case 1:		//回転なし(↑)
             break;
           case 8:		//右に90度(→)
             $degrees = 90;
             break;
           case 3:		//180度回転(↓)
             $degrees = 180;
             break;
           case 6:		//右に270度回転(←)
             $degrees = 270;
             break;
           case 2:		//反転 (↑)
             $mode = IMG_FLIP_HORIZONTAL;
             break;
           case 7:		//反転して右90度(→)
             $degrees = 90;
             $mode = IMG_FLIP_HORIZONTAL;
             break;
           case 4:		//反転して180度なんだけど縦反転と同じ(↓)
             $mode = IMG_FLIP_VERTICAL;
             break;
           case 5:		//反転して270度(←)
             $degrees = 270;
             $mode = IMG_FLIP_HORIZONTAL;
             break;
         }
         //反転(2,7,4,5)
         if (isset($mode)) {
           $image = imageflip($image, $mode);
         }
         //回転(8,3,6,7,5)
         if ($degrees > 0) {
           $image = imagerotate($image, $degrees, 0);
         }

         //保存
         if (mime_content_type($filename) == 'image/jpeg') {
           ImageJPEG($image, $filename);
         }else {
           ImagePNG($image, $filename);
         }
         // //メモリ解放
         imagedestroy($image);
       }
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