在PHP中可以使用“parse_url()”函数来获取url参数信息,该函数的语法是“array parse_url(string $url)”,其返回值是一个关联数组,且包含现有URL的各种组成部分。
php如何获取url参数信息?
在PHP中,可以使用parse_url()函数来获取url参数信息。parse_url()可以解析 URL,返回其组成部分。
语法:
array parse_url(string $url)
此函数返回一个关联数组,包含现有 URL 的各种组成部分。如果缺少了其中的某一个,则不会为这个组成部分创建数组项。组成部分为:
scheme - 如 http
host - 如 localhost
port - 如 80user
pass
path - 如 /parse_str.php
query - 在问号 ? 之后 如 id=1&category=php&title=php-install
fragment - 在散列符号 # 之后
此函数并不意味着给定的 URL 是合法的,它只是将上方列表中的各部分分开。parse_url() 可接受不完整的 URL,并尽量将其解析正确。此函数对相对路径的 URL 不起作用。
<?php $url = 'http://www.php.cn/vip.html'; $url=parse_url($url); echo '协议 : '.$url['scheme']."<br>"; echo '主机 : '.$url['host']."<br>"; echo '路径 : '.$url['path']."<br>"; ?>
程序运行结果如下:
<?php $url = 'http://username:password@hostname/path?arg=value#anchor'; print_r(parse_url($url)); echo '<br />'; echo parse_url($url, PHP_URL_PATH); ?>
程序输出:
Array ( [scheme] => http [host] => hostname [user] => username [pass] => password [path] => /path [query] => arg=value [fragment] => anchor )
可以看到,可以很容易分解出一个URL的各个部,那如果要拿指定的部分出来的话也很容易,如:
echo parse_url($url, PHP_URL_PATH);
就是在第二个参数中,设定如下的参数:
PHP_URL_SCHEME, PHP_URL_HOST, PHP_URL_PORT, PHP_URL_USER, PHP_URL_PASS, PHP_URL_PATH, PHP_URL_QUERY or PHP_URL_FRAGMENT。
注:对严重不合格的 URL,parse_url() 可能会返回 FALSE。
更多相关知识,请访问 PHP中文网!!

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