class.ilFile.php

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<?php
abstract class ilFile
{
    protected string $path;

    public function deleteTrailingSlash(string $a_path): string
    {
        // DELETE TRAILING '/'
        if (str_ends_with($a_path, '/') || str_ends_with($a_path, "\\")) {
            return substr($a_path, 0, -1);
        }

        return $a_path;
    }
}