Url几个常用的函数，Url常用函数_PHP教程

    <span>$_url</span> = "http://www.baidu.com/web?id=15&page=5"<span>;
    $_par = pares_url($_url);
    </span><span>var_dump</span>($_par);<br /><br />输出结果：

<span>array</span>(4<span>) {
  [</span>"scheme"]=>
  <span>string</span>(4) "http"<span>
  [</span>"host"]=>
  <span>string</span>(13) "www.baidu.com"<span>
  [</span>"path"]=>
  <span>string</span>(4) "/web"<span>
  [</span>"query"]=>
  <span>string</span>(12) "id=15&page=5"<span>
}</span>

    <span>parse_str</span>(<span>$_par</span>['query'],<span>$_query</span><span>);
    </span><span>var_dump</span>(<span>$_query</span><span>);

输出结果：
</span><span>array</span>(2<span>) {
  [</span>"id"]=>
  <span>string</span>(2) "15"<span>
  [</span>"page"]=>
  <span>string</span>(1) "5"<span>
}</span>

    <span>unset</span>(<span>$_query</span>['page']);  <span>//</span><span>清空page</span>
    <span>var_dump</span>(<span>http_build_query</span>(<span>$_query</span><span>));

输出：


</span><span>string</span>(5) "id=15"