Use of Locale Unsafe functions

[tcyrus]

basename, dirname, and pathinfo are locale aware, meaning that they will only handle characters that match up with the PHP default locale (ASCII). For example, Using Non-ASCII Unicode filenames for Media files would cause Grav to ignore them, since it used basename for checks (Fixed in #2083). There is a similar issue here with the use of pathinfo (See php.net for more info):

grav/system/src/Grav/Common/Page/Medium/MediumFactory.php

Line 29 in cad10b6

$parts = pathinfo($file);

One solution is to make a set of locale safe helper functions. I have made a set of helper functions that can be used as an example here.

[rhukster]

https://github.com/PHPMailer/PHPMailer/blob/5c9d3c548497390822369516691139f0a724b621/src/PHPMailer.php#L4005-L4039

Good idea.. perhaps for 1.5