rosell-dk / image-mime-type-guesser

src/Detectors/MimeContentType.php

<?php

namespace ImageMimeTypeGuesser\Detectors;

class MimeContentType extends AbstractDetector
{

    /**
     *  Try to detect mime type of image using "mime_content_type"
     *
     *  Like all detectors, it returns:
     *  - null  (if it cannot be determined)
     *  - false (if it can be determined that this is not an image)
     *  - mime  (if it is in fact an image, and type could be determined)
     *  @return  mime | null | false.

The doc comment mime | null | false. at position 4 could not be parsed: Unknown type name 'false.' at position 4 in mime | null | false..

     */
    protected function doDetect($filePath)
    {
        // mime_content_type supposedly used to be deprecated, but it seems it isn't anymore
        // it may return false on failure.
        if (function_exists('mime_content_type')) {
            try {
                $result = mime_content_type($filePath);
                if ($result !== false) {
                    if (strpos($result, 'image/') === 0) {
                        return $result;
                    } else {
                        return false;
                    }
                }
            } catch (\Exception $e) {
                // we are unstoppable!
            }
        }
    }
}