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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * ImageMimeTypeGuesser - Detect / guess mime type of an image |
| 5 | * |
| 6 | * @link https://github.com/rosell-dk/image-mime-type-guesser |
| 7 | * @license MIT |
| 8 | */ |
| 9 | |
| 10 | namespace ImageMimeTypeGuesser; |
| 11 | |
| 12 | class GuessFromExtension |
| 13 | { |
| 14 | |
| 15 | |
| 16 | /** |
| 17 | * Make a wild guess based on file extension. |
| 18 | * |
| 19 | * - and I mean wild! |
| 20 | * |
| 21 | * Only most popular image types are recognized. |
| 22 | * Many are not. See this list: https://www.iana.org/assignments/media-types/media-types.xhtml |
| 23 | * - and the constants here: https://secure.php.net/manual/en/function.exif-imagetype.php |
| 24 | * |
| 25 | * If no mapping found, nothing is returned |
| 26 | * |
| 27 | * Returns: |
| 28 | * - mimetype (if file extension could be mapped to an image type), |
| 29 | * - false (if file extension could be mapped to a type known not to be an image type) |
| 30 | * - null (if file extension could not be mapped to any mime type, using our little list) |
| 31 | * |
| 32 | * @param string $filePath The path to the file |
| 33 | * @return string|false|null mimetype (if file extension could be mapped to an image type), |
| 34 | * false (if file extension could be mapped to a type known not to be an image type) |
| 35 | * or null (if file extension could not be mapped to any mime type, using our little list) |
| 36 | */ |
| 37 | public static function guess($filePath) |
| 38 | { |
| 39 | if (!@file_exists($filePath)) { |
| 40 | return false; |
| 41 | } |
| 42 | /* |
| 43 | Not using pathinfo, as it is locale aware, and I'm not sure if that could lead to problems |
| 44 | |
| 45 | if (!function_exists('pathinfo')) { |
| 46 | // This is really a just in case! - We do not expect this to happen. |
| 47 | // - in fact we have a test case asserting that this does not happen. |
| 48 | return null; |
| 49 | // |
| 50 | $fileExtension = pathinfo($filePath, PATHINFO_EXTENSION); |
| 51 | $fileExtension = strtolower($fileExtension); |
| 52 | }*/ |
| 53 | |
| 54 | return MimeMap::filenameToMime($filePath); |
| 55 | } |
| 56 | } |