编程语言:PHP

// Inintialize a URL to the variable 
$url = 'https://www.youtube.com/watch?v=qnMxsGeDz90'; 
    
// Use parse_url() function to parse the URL 
// and return an associative array which contains its various components 
$url_components = parse_url($url); 

// Use the parse_str() function to parse the 
// string passed via the URL 
parse_str($url_components['query'], $params); 
    
// Display result 
echo 'v parameter value is ' . $params['v'];

这对我很管用。

PHP的方法是使用parse_url函数，该函数解析URL并返回其组件。包括查询字符串。

例子:

$url = 'www.mysite.com/category/subcategory?myqueryhash';
echo parse_url($url, PHP_URL_QUERY); # output "myqueryhash"

完整的文档在这里

如果你想要整个查询字符串:

$_SERVER["QUERY_STRING"]

下面是重建REFERRER查询字符串部分的函数。

如果调用页已经在它自己的URL中有一个查询字符串，你必须返回到那个页面，并想要返回一些而不是全部的$_GET变量(例如，一个页码)。

示例:引用者的查询字符串是?foo=1&bar=2&baz=3调用refererQueryString('foo'， 'baz')返回foo=1&baz=3":

function refererQueryString(/* var args */) {

    //Return empty string if no referer or no $_GET vars in referer available:
    if (!isset($_SERVER['HTTP_REFERER']) ||
        empty( $_SERVER['HTTP_REFERER']) ||
        empty(parse_url($_SERVER['HTTP_REFERER'], PHP_URL_QUERY ))) {

        return '';
    }

    //Get URL query of referer (something like "threadID=7&page=8")
    $refererQueryString = parse_url(urldecode($_SERVER['HTTP_REFERER']), PHP_URL_QUERY);

    //Which values do you want to extract? (You passed their names as variables.)
    $args = func_get_args();

    //Get '[key=name]' strings out of referer's URL:
    $pairs = explode('&',$refererQueryString);

    //String you will return later:
    $return = '';

    //Analyze retrieved strings and look for the ones of interest:
    foreach ($pairs as $pair) {
        $keyVal = explode('=',$pair);
        $key = &$keyVal[0];
        $val = urlencode($keyVal[1]);
        //If you passed the name as arg, attach current pair to return string:
        if(in_array($key,$args)) {
            $return .= '&'. $key . '=' .$val;
        }
    }

    //Here are your returned 'key=value' pairs glued together with "&":
    return ltrim($return,'&');
}

//If your referer was 'page.php?foo=1&bar=2&baz=3'
//and you want to header() back to 'page.php?foo=1&baz=3'
//(no 'bar', only foo and baz), then apply:

header('Location: page.php?'.refererQueryString('foo','baz'));

编程语言:PHP

// Inintialize a URL to the variable 
$url = 'https://www.youtube.com/watch?v=qnMxsGeDz90'; 
    
// Use parse_url() function to parse the URL 
// and return an associative array which contains its various components 
$url_components = parse_url($url); 

// Use the parse_str() function to parse the 
// string passed via the URL 
parse_str($url_components['query'], $params); 
    
// Display result 
echo 'v parameter value is ' . $params['v'];

这对我很管用。

$_SERVER['QUERY_STRING']包含您正在查找的数据。

文档

php.net: $_SERVER -手动