Code Coverage for /home/runner/work/image-mime-type-guesser/image-mime-type-guesser/src/Detectors/ExifImageType.php

1	<?php
2
3	namespace ImageMimeTypeGuesser\Detectors;
4
5	use \ImageMimeTypeGuesser\Detectors\AbstractDetector;
6
7	class ExifImageType extends AbstractDetector
8	{
9
10	/**
11	* Try to detect mime type of image using exif_imagetype.
12	*
13	* Returns:
14	* - mime type (string) (if it is in fact an image, and type could be determined)
15	* - false (if it is not an image type that the server knowns about)
16	* - null (if nothing can be determined)
17	*
18	* @param string $filePath The path to the file
19	* @return string\|false\|null mimetype (if it is an image, and type could be determined),
20	* false (if it is not an image type that the server knowns about)
21	* or null (if nothing can be determined)
22	*/
23	protected function doDetect($filePath)
24	{
25	// exif_imagetype is fast, however not available on all systems,
26	// It may return false. In that case we can rely on that the file is not an image (and return false)
27	if (function_exists('exif_imagetype')) {
28	try {
29	$imageType = exif_imagetype($filePath);
30	return ($imageType ? image_type_to_mime_type($imageType) : false);
31	} catch (\Exception $e) {
32	// Might for example get "Read error!"
33	// (for some reason, this happens on very small files)
34	// We handle such errors as indeterminable (null)
35	return null;
36	// well well, don't let this stop us
37	//echo $e->getMessage();
38	//throw($e);
39	}
40	}
41	return null;
42	}
43	}