ImageMimeTypeGuesser\GuessFromExtension

Complexity

Total Complexity

16

Size/Duplication

Total Lines	58
Duplicated Lines	0 %

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
C	guess()	0	32	16

<?php

/**
 * ImageMimeTypeGuesser - Detect / guess mime type of an image
 *
 * @link https://github.com/rosell-dk/image-mime-type-guesser
 * @license MIT
 */

namespace ImageMimeTypeGuesser;

class GuessFromExtension
{


    /**
     *  Make a wild guess based on file extension.
     *
     *  - and I mean wild!
     *
     *  Only most popular image types are recognized.
     *  Many are not. See this list: https://www.iana.org/assignments/media-types/media-types.xhtml
     *                - and the constants here: https://secure.php.net/manual/en/function.exif-imagetype.php
     *
     *  If no mapping found, nothing is returned
     *
     *  TODO: jp2, jpx, ...
     * Returns:
     * - mimetype (if file extension could be mapped to an image type),
     * - false (if file extension could be mapped to a type known not to be an image type)
     * - void (if file extension could not be mapped to any mime type, using our little list)
     *
     * @param  string  $filePath  The path to the file
     * @return string|false|void  mimetype (if file extension could be mapped to an image type),
     *    false (if file extension could be mapped to a type known not to be an image type)
     *    or void (if file extension could not be mapped to any mime type, using our little list)
     */
    public static function guess($filePath)
    {
        $fileExtension = pathinfo($filePath, PATHINFO_EXTENSION);
        $fileExtension = strtolower($fileExtension);

        switch ($fileExtension) {
            case 'bmp':
            case 'gif':
            case 'jpeg':
            case 'png':
            case 'tiff':
            case 'webp':
                return 'image/' . $fileExtension;

            case 'ico':
                return 'image/vnd.microsoft.icon';      // or perhaps 'x-icon' ?

            case 'jpg':
                return 'image/jpeg';

            case 'svg':
                return 'image/svg+xml';

            case 'tif':
                return 'image/tiff';

            case 'txt':
            case 'doc':
            case 'exe':
            case 'zip':
            case 'gz':
                return false;

        }
    }
}