示例
<?php
$url = 'http://username:password@hostname/path?arg=value#anchor';print_r(parse_url($url));
?>结果
Array
(
    [scheme] => http
    [host] => hostname
    [user] => username
    [pass] => password
    [path] => /path
    [query] => arg=value
    [fragment] => anchor
)相关函数
string http_build_url ([ mixed $url [, mixed $parts [, int $flags = HTTP_URL_REPLACE [, array &$new_url ]]]] )示例
<?php
echo http_build_url("http://[email protected]/pub/index.php?a=b#files",
    array(
        "scheme" => "ftp",
        "host" => "ftp.example.com",
        "path" => "files/current/",
        "query" => "a=c"
    ),
    HTTP_URL_STRIP_AUTH | HTTP_URL_JOIN_PATH | HTTP_URL_JOIN_QUERY | HTTP_URL_STRIP_FRAGMENT
);
?> 结果
ftp://ftp.example.com/pub/files/current/?a=b&a=c