voku / Stringy

        $stringy->str = \preg_replace('/[-_\s]+/', $replacement, $stringy->str);

        $l = \strlen($replacement);

        if (\strpos($stringy->str, $replacement) === 0) {

            $stringy->str = \substr($stringy->str, $l);

        }

        if (\substr($stringy->str, -$l) === $replacement) {

            $stringy->str = \substr($stringy->str, 0, \strlen($stringy->str) - $l);

            $stringy->str = \substr($stringy->str, $l);

        }

        if (\substr($stringy->str, -$l) === $replacement) {

            $stringy->str = \substr($stringy->str, 0, \strlen($stringy->str) - $l);

        }

        return static::create($stringy->str, $this->encoding);

    }