PHP parse_url 一个好用的函数

举例子如下:

$url = "http://www.electrictoolbox.com/php-extract-domain-from-full-url/";
$parts = parse_url($url);

输出:

array
(
[scheme] => http
[host] => www.electrictoolbox.com
[path] => /php-extract-domain-from-full-url/
)

又如:

<?php
$url = 'http://username:password@hostname/path?arg=value#anchor';
print_r(parse_url($url));
echo parse_url($url, php_url_path);
?>

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.