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1 | <?php |
2 | |
3 | namespace ImageMimeTypeGuesser\Detectors; |
4 | |
5 | class FInfo extends AbstractDetector |
6 | { |
7 | |
8 | /** |
9 | * Try to detect mime type of image using *finfo* class. |
10 | * |
11 | * Returns: |
12 | * - mime type (string) (if it is in fact an image, and type could be determined) |
13 | * - false (if it is not an image type that the server knowns about) |
14 | * - null (if nothing can be determined) |
15 | * |
16 | * @param string $filePath The path to the file |
17 | * @return string|false|null mimetype (if it is an image, and type could be determined), |
18 | * false (if it is not an image type that the server knowns about) |
19 | * or null (if nothing can be determined) |
20 | */ |
21 | protected function doDetect($filePath) |
22 | { |
23 | |
24 | if (class_exists('finfo')) { |
25 | // phpcs:ignore PHPCompatibility.PHP.NewClasses.finfoFound |
26 | $finfo = new \finfo(FILEINFO_MIME); |
27 | $result = $finfo->file($filePath); |
28 | if ($result === false) { |
29 | // false means an error occured |
30 | return null; |
31 | } else { |
32 | $mime = explode('; ', $result); |
33 | $result = $mime[0]; |
34 | |
35 | if (strpos($result, 'image/') === 0) { |
36 | return $result; |
37 | } else { |
38 | return false; |
39 | } |
40 | } |
41 | } |
42 | return null; |
43 | } |
44 | } |