我目前使用此功能很满意

function url($url) {
   $url = preg_replace('~[^\pL0-9_]+~u', '-', $url);
   $url = trim($url, "-");
   $url = iconv("utf-8", "us-ascii//TRANSLIT", $url);
   $url = strtolower($url);
   $url = preg_replace('~[^-a-z0-9_]+~', '', $url);
   return $url;
}

它将空格和其他奇数字符替换为-，因此结果将为peter-s-pet-shop-washing