is_readable

<?php     public static function isReadable($path)

    {

        if (is_readable($path)) {

            return true;

        }

<?php             if (

                !ini_get('open_basedir')

                && is_readable('/proc/version')

                && false !== stripos(Silencer::call('file_get_contents', '/proc/version'), 'microsoft')

                && !file_exists('/.dockerenv') // docker running inside WSL should not be seen as WSL

            ) {

<?php             throw new IOException(sprintf('Could not check if file is readable because path length exceeds %d characters.', $maxPathLength), 0, null, $filename);

        }



        return is_readable($filename);

    }