通过添加GET参数来处理url字符串 [英] Manipulate a url string by adding GET parameters
本文介绍了通过添加GET参数来处理url字符串的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在不重复?
或&
的情况下向可能包含和不包含GET参数的URL添加GET参数.
I want to add GET parameters to URLs that may and may not contain GET parameters without repeating ?
or &
.
示例:
如果我要添加category=action
$url="http://www.acme.com";
// will add ?category=action at the end
$url="http://www.acme.com/movies?sort=popular";
// will add &category=action at the end
如果您发现发现的问题,我会尽量不重复.
If you notice I'm trying to not repeat the question mark if it's found.
URL只是一个字符串.
The URL is just a string.
添加特定的GET参数的可靠方法是什么?
What is a reliable way to append a specific GET parameter?
推荐答案
基本方法
$query = parse_url($url, PHP_URL_QUERY);
// Returns a string if the URL has parameters or NULL if not
if ($query) {
$url .= '&category=1';
} else {
$url .= '?category=1';
}
更高级
$url = 'http://example.com/search?keyword=test&category=1&tags[]=fun&tags[]=great';
$url_parts = parse_url($url);
// If URL doesn't have a query string.
if (isset($url_parts['query'])) { // Avoid 'Undefined index: query'
parse_str($url_parts['query'], $params);
} else {
$params = array();
}
$params['category'] = 2; // Overwrite if exists
$params['tags'][] = 'cool'; // Allows multiple values
// Note that this will url_encode all values
$url_parts['query'] = http_build_query($params);
// If you have pecl_http
echo http_build_url($url_parts);
// If not
echo $url_parts['scheme'] . '://' . $url_parts['host'] . $url_parts['path'] . '?' . $url_parts['query'];
如果不是类,则应至少将其放在函数中.
You should put this in a function at least, if not a class.
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