php 通过添加 GET 参数来操作 url 字符串
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Manipulate a url string by adding GET parameters
提问by Ryan
I want to add GET parameters to URLs that may and may not contain GET parameters without repeating ?or &.
我想将 GET 参数添加到可能包含也可能不包含 GET 参数的 URL 中，而不重复?或&。
Example:
例子：
If I want to add category=action
如果我想添加 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
If you notice I'm trying to not repeat the question mark if it's found.
如果你注意到我试图不重复问号，如果它被找到了。
The URL is just a string.
URL 只是一个字符串。
What is a reliable way to append a specific GET parameter?
附加特定 GET 参数的可靠方法是什么？
回答by andrewtweber
Basic method
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';
}
More advanced
更先进
$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'];
You should put this in a function at least, if not a class.
你至少应该把它放在一个函数中，如果不是一个类。
回答by rybo111
Here's a shorter version of the accepted answer:
这是已接受答案的较短版本：
$url .= (parse_url($url, PHP_URL_QUERY) ? '&' : '?') . 'category=action';
Edit: as discussed in the accepted answer, this is flawed in that it doesn't check to see if categoryalready exists. A better solution would be to treat the $_GETfor what it is - an array - and use functions like in_array().
编辑：正如在接受的答案中所讨论的，这是有缺陷的，因为它不检查是否category已经存在。一个更好的解决办法是对待$_GET它是什么-一个数组-和喜欢使用的功能in_array()。
回答by Tom Claus
$data = array('foo'=>'bar',
'baz'=>'boom',
'cow'=>'milk',
'php'=>'hypertext processor');
$queryString = http_build_query($data);
//$queryString = foo=bar&baz=boom&cow=milk&php=hypertext+processor
echo 'http://domain.com?'.$queryString;
//output: http://domain.com?foo=bar&baz=boom&cow=milk&php=hypertext+processor
回答by Doug T.
Use strposto detect a ?. Since ? can only appear in the URL at the beginning of a query string, you know if its there get params already exist and you need to add params using &
使用strpos检测 ?。自从 ？只能出现在查询字符串开头的 URL 中，您知道它是否已经存在 get params 并且您需要使用 & 添加 params
function addGetParamToUrl(&$url, $varName, $value)
{
// is there already an ?
if (strpos($url, "?"))
{
$url .= "&" . $varName . "=" . $value;
}
else
{
$url .= "?" . $varName . "=" . $value;
}
}
回答by user2171027
This function overwrites an existing argument
此函数覆盖现有参数
function addToURL( $key, $value, $url) {
$info = parse_url( $url );
parse_str( $info['query'], $query );
return $info['scheme'] . '://' . $info['host'] . $info['path'] . '?' . http_build_query( $query ? array_merge( $query, array($key => $value ) ) : array( $key => $value ) );
}
回答by Артур Курицын
Example with updating existent parameters.
更新现有参数的示例。
Also url_encode used, and possibility to don't specify parameter value
还使用了 url_encode，并且可能不指定参数值
<?
/**
* Add parameter to URL
* @param string $url
* @param string $key
* @param string $value
* @return string result URL
*/
function addToUrl($url, $key, $value = null) {
$query = parse_url($url, PHP_URL_QUERY);
if ($query) {
parse_str($query, $queryParams);
$queryParams[$key] = $value;
$url = str_replace("?$query", '?' . http_build_query($queryParams), $url);
} else {
$url .= '?' . urlencode($key) . '=' . urlencode($value);
}
return $url;
}
回答by shengbin_xu
<?php
$url1 = '/test?a=4&b=3';
$url2 = 'www.baidu.com/test?a=4&b=3&try_count=1';
$url3 = 'http://www.baidu.com/test?a=4&b=3&try_count=2';
$url4 = '/test';
function add_or_update_params($url,$key,$value){
$a = parse_url($url);
$query = $a['query'] ? $a['query'] : '';
parse_str($query,$params);
$params[$key] = $value;
$query = http_build_query($params);
$result = '';
if($a['scheme']){
$result .= $a['scheme'] . ':';
}
if($a['host']){
$result .= '//' . $a['host'];
}
if($a['path']){
$result .= $a['path'];
}
if($query){
$result .= '?' . $query;
}
return $result;
}
echo add_or_update_params($url1,'try_count',1);
echo "\n";
echo add_or_update_params($url2,'try_count',2);
echo "\n";
echo add_or_update_params($url3,'try_count',3);
echo "\n";
echo add_or_update_params($url4,'try_count',4);
echo "\n";
回答by Hammerite
I think you should do it something like this.
我认为你应该这样做。
class myURL {
protected $baseURL, $requestParameters;
public function __construct ($newURL) {
$this->baseurl = $newURL;
$this->requestParameters = array();
}
public function addParameter ($parameter) {
$this->requestParameters[] = $parameter;
}
public function __toString () {
return $this->baseurl.
( count($this->requestParameters) ?
'?'.implode('&', $this->requestParameters) :
''
);
}
}
$url1 = new myURL ('http://www.acme.com');
$url2 = new myURL ('http://www.acme.com');
$url2->addParameter('sort=popular');
$url2->addParameter('category=action');
$url1->addParameter('category=action');
echo $url1."\n".$url2;
回答by TaylorOtwell
$parameters = array();
foreach ($get as $key => $value)
{
$parameters[] = $key.'='.$value;
}
$url = 'http://example.com/movies?'.implode('&', $parameters);
回答by Londeren
/**
* @example addParamToUrl('/path/to/?find=1', array('find' => array('search', 2), 'FILTER' => 'STATUS'))
* @example addParamToUrl('//example.com/path/to/?find=1', array('find' => array('search', 2), 'FILTER' => 'STATUS'))
* @example addParamToUrl('https://example.com/path/to/?find=1&FILTER=Y', array('find' => array('search', 2), 'FILTER' => 'STATUS'))
*
* @param $url string url
* @param array $addParams
*
* @return string
*/
function addParamToUrl($url, array $addParams) {
if (!is_array($addParams)) {
return $url;
}
$info = parse_url($url);
$query = array();
if ($info['query']) {
parse_str($info['query'], $query);
}
if (!is_array($query)) {
$query = array();
}
$params = array_merge($query, $addParams);
$result = '';
if ($info['scheme']) {
$result .= $info['scheme'] . ':';
}
if ($info['host']) {
$result .= '//' . $info['host'];
}
if ($info['path']) {
$result .= $info['path'];
}
if ($params) {
$result .= '?' . http_build_query($params);
}
return $result;
}
