Url几个常用的函数
parse_url()
本函数解析一个 URL 并返回一个关联数组,包含在 URL 中出现的各种组成部分。
本函数不是用来验证给定 URL 的合法性的,只是将其分解为下面列出的部分。不完整的 URL 也被接受, parse_url() 会尝试尽量正确地将其解析。
<span style="color: #800080;">$_url</span> = "http://www.baidu.com/web?id=15&page=5"<span style="color: #000000;">; $_par = pares_url($_url); </span><span style="color: #008080;">var_dump</span>($_par);<br><br>输出结果:
<span style="color: #0000ff;">array</span>(4<span style="color: #000000;">) { [</span>"scheme"]=> <span style="color: #0000ff;">string</span>(4) "http"<span style="color: #000000;"> [</span>"host"]=> <span style="color: #0000ff;">string</span>(13) "www.baidu.com"<span style="color: #000000;"> [</span>"path"]=> <span style="color: #0000ff;">string</span>(4) "/web"<span style="color: #000000;"> [</span>"query"]=> <span style="color: #0000ff;">string</span>(12) "id=15&page=5"<span style="color: #000000;">}</span>
parse_str()
将字符串解析成多个变量
<span style="color: #008080;">parse_str</span>(<span style="color: #800080;">$_par</span>['query'],<span style="color: #800080;">$_query</span><span style="color: #000000;">); </span><span style="color: #008080;">var_dump</span>(<span style="color: #800080;">$_query</span><span style="color: #000000;">);输出结果:</span><span style="color: #0000ff;">array</span>(2<span style="color: #000000;">) { [</span>"id"]=> <span style="color: #0000ff;">string</span>(2) "15"<span style="color: #000000;"> [</span>"page"]=> <span style="color: #0000ff;">string</span>(1) "5"<span style="color: #000000;">}</span>
http_bulid_query()
使用给出的关联(或下标)数组生成一个经过 URL-encode 的请求字符串。
<span style="color: #0000ff;">unset</span>(<span style="color: #800080;">$_query</span>['page']); <span style="color: #008000;">//</span><span style="color: #008000;">清空page</span> <span style="color: #008080;">var_dump</span>(<span style="color: #008080;">http_build_query</span>(<span style="color: #800080;">$_query</span><span style="color: #000000;">));输出:</span><span style="color: #0000ff;">string</span>(5) "id=15"
用于解析、拆分、重组URL字符串。

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