Created
August 7, 2017 23:27
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| <?php | |
| function imagecreatefromstring_autorotate($data) | |
| { | |
| $img = imagecreatefromstring($data); | |
| if (substr($data, 0, 3) == "\xFF\xD8\xFF" && ($data{3} == "\xDB" || $data{3} == "\xE0" || $data{3} == "\xE1")) { | |
| $orientation = -1; | |
| if (function_exists('exif_read_data')) { | |
| $data_stream = preg_replace('@^data:@', 'data://', rawurlencode($data)); | |
| $exif = exif_read_data($data_stream); | |
| if (isset($exif['Orientation'])) | |
| $orientation = $exif['Orientation']; | |
| } else if (preg_match('@\x12\x01\x03\x00\x01\x00\x00\x00(.)\x00\x00\x00@', $data, $matches)) { | |
| // Little endian EXIF | |
| $orientation = ord($matches[1]); | |
| } else if (preg_match('@\x01\x12\x00\x03\x00\x00\x00\x01\x00(.)\x00\x00@', $data, $matches)) { | |
| // Big endian EXIF | |
| $orientation = ord($matches[1]); | |
| } | |
| switch($orientation) { | |
| case 2: | |
| $img = imageflip($img, IMG_FLIP_HORIZONTAL); | |
| break; | |
| case 3: | |
| $img = imagerotate($img, 180, 0); | |
| break; | |
| case 4: | |
| $img = imageflip($img, IMG_FLIP_VERTICAL); | |
| break; | |
| case 5: | |
| $img = imageflip($img, IMG_FLIP_VERTICAL); | |
| // Fallthrough | |
| case 6: | |
| $img = imagerotate($img, -90, 0); | |
| break; | |
| case 7: | |
| $img = imageflip($img, IMG_FLIP_VERTICAL); | |
| // Fallthrough | |
| case 8: | |
| $img = imagerotate($img, 90, 0); | |
| break; | |
| } | |
| } | |
| return $img; | |
| } |
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