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php解析url (parse_url) 参数成数组 (parse_str)

Jun 21, 2016 am 08:47 AM
array parse php url

通过php获取了当前url,如果需要提取url中的参数的话该如何操作呢?这个过程其实挺简单,使用php的两个内置函数就可以顺利完成,即parse_url和parse_str函数。下面将对这两个函数做简要说明以及用示例说明如何提取url中的参数。

(1)parse_url (PHP 4, PHP 5) — 解析 URL,返回其组成部分,函数原型如下:

mixed parse_url ( string $url [, int $component = -1 ] )

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。

参数说明

url 要解析的 URL。无效字符将使用 _ 来替换。

component 指定 PHP_URL_SCHEME、 PHP_URL_HOST、 PHP_URL_PORT、 PHP_URL_USER、 PHP_URL_PASS、 PHP_URL_PATH、 PHP_URL_QUERY 或 PHP_URL_FRAGMENT 的其中一个来获取 URL 中指定的部分的 string。 (除了指定为 PHP_URL_PORT 后,将返回一个 integer 的值)。

返回值

对严重不合格的 URL,parse_url() 可能会返回 FALSE。

如果省略了 component 参数,将返回一个关联数组 array,在目前至少会有一个元素在该数组中。数组中可能的键有以下几种:

scheme - 如 http
host
port
user
pass
path
query - 在问号 ? 之后
fragment - 在散列符号 # 之后

如果指定了 component 参数, parse_url() 返回一个 string (或在指定为 PHP_URL_PORT 时返回一个 integer)而不是 array。如果 URL 中指定的组成部分不存在,将会返回 NULL。

(2)parse_str - 把查询字符串解析到变量中,函数原型如下:

parse_str(string,array)

参数说明
 
string 必需。规定要解析的字符串。

array 可选。规定存储变量的数组名称。该参数指示变量存储到数组中。如果未设置 array 参数,由该函数设置的变量将覆盖已由同名变量。

注释:php.ini 中的 magic_quotes_gpc 设置影响该函数的输出。如果已启用,那么在 parse_str() 解析之前,变量会被 addslashes() 转换。

(3)具体提取url中的参数示例如下:

<?php
$url='http://www.Alixixi.com/ad.php?id=325&action=index&page=3';
$urlarr=parse_url($url);
parse_str($urlarr['query'],$parr);
print_r($urlarr);
print_r($parr);
Copy after login

打印的结果如下:

Array
(
    [scheme] => http
    [host] => www.Alixixi.com
    [path] => /ad.php
    [query] => id=325&action=index&page=3
)
Array
(
    [id] => 325
    [action] => index
    [page] => 3
)

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