[get_headers 获取头信息](URLs/get_headers%E8%8E%B7%E5%8F%96%E5%A4%B4%E4%BF%A1%E6%81%AF.md) [http_build_query 数组转 query](URLs/http_build_query%E6%95%B0%E7%BB%84%E8%BD%ACquery.md) [parse_url 解析 URL 返回数组](URLs/parse_url%E8%A7%A3%E6%9E%90URL%E8%BF%94%E5%9B%9E%E6%95%B0%E7%BB%84.md) [urldecode 和 urlencode](URLs/urldecode%E5%92%8Curlencode.md)