[BC/BREAK] Issue with remote files since v2.0.23

[PastisD]

Hello,

Since commit 25fbb91a95d41d44587ee7ca8923745b66221a7d, the remote urls are not working anymore because file_exists() always return false with remote url. Maybe we can use curlor get_headers() or whatever you want with filter_var($url, FILTER_VALIDATE_URL); :)