来自url和查询数据库的php breadcrumbs

URL后面的变量字符串称为查询字符串。检查查询字符串中是否存在变量的最佳方法是查看$\u GET数组。

所以。。。如果您有:

http://google.com/?key=value&another_key=another_value&forum=22

您可以这样检查变量'forum':

if (isset($_GET['forum'])){

  // 'forum' has been set in the query string, do something...

} else {

  // 'forum' has NOT been set.
}

我设法解决了它我需要的,它不是那么难

function breadcrumb(
                $home = 'Home', // Name of root link
                $division = ' / ', // Divider between links
                $hidextra = true, // Toggle hide/show get data and fragment in text
                $index = false,  // Toggle show/hide link to directory if it does not contain a file
                $indexname = 'index.php' // The definition of the file the directory must contain
    ) {
        global $host,$dbUser,$dbPass,$dbName;

        require_once("php/database/connection.php");
        require_once("php/database/MySQL.php");

        // Connect to the database and grab the email
        $db = & new MySQL($host,$dbUser,$dbPass,$dbName);

        $breadcrumb="";

        // Requested addons...
        $extension = '.php'; // Extension to cut off the end of the TEXT links
        $ifIndex = 'index.php'; // Filename of index/default/home files to not display
        // End requested addons

        $whole = $_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];

        $parts = explode('/', $whole);
        $parts[0] = 'http://'.$parts[0];

        $array = array('-', '%20');

        $breadcrumb .=  "<a href=\"{$parts[0]}\">{$home}</a>{$division}";
        $k = 1;
        for ($i=1;$i < sizeof($parts);$i++) {
            $uri = '/';
            while ($k <= $i) {
                    $uri .= $parts[$k];
                    if ($k != (sizeof($parts)-1)) $uri .= '/';
                    $k++;
             }
              if (($index && is_dir($_SERVER['DOCUMENT_ROOT'].$uri) && is_file($_SERVER['DOCUMENT_ROOT'].$uri.$indexname) 
            || !$index 
            || !is_dir($_SERVER['DOCUMENT_ROOT'].$uri)) && $parts[$i] != $ifIndex) {
                $breadcrumb .= "<a href=\"$uri\">";
                if ($hidextra) {
                    if($parts[$i-1]=="forum") {
                        $board = substr($parts[$i],6);
                        $sql = "SELECT boardname FROM boards WHERE boardid='".$board."'";
                        $result = $db->query($sql);

                        while($row=$result->fetch()) {
                            extract($row, EXTR_PREFIX_INVALID, '_');
                            $breadcrumb .= $boardname;
                        }
                    } 
                    else if($parts[$i-2]=="forum") {
                        $topic = substr($parts[$i],10);
                        $sql = "SELECT topicname FROM topics WHERE topicid='".$topic."'";
                        $result = $db->query($sql);

                        while($row=$result->fetch()) {
                            extract($row, EXTR_PREFIX_INVALID, '_');
                            $breadcrumb .= $topicname;
                        }
                    }
                    else {
                        $breadcrumb .= rtrim(preg_replace("/\?.*$/", '', ucwords(str_replace($array," ",$parts[$i]))), $extension);
                    }
                }
                else {
                    $breadcrumb .= rtrim(ucwords($parts[$i]), $extension);
                }
                $breadcrumb .= '</a>';
            }
            else {
                $breadcrumb .= ucwords(str_replace($array," ",$parts[$i])); 
            }

              if (isset($parts[($i+1)])) {
                $breadcrumb .= $division;
            }
              $k = 1;
        }
        return $breadcrumb;
    }

我必须检查当前的部分,如果以前是'论坛',建立一个连接到数据库,抓取我需要的信息,然后更换什么是在面包屑在这一点上。下一个面包屑也是这样。

现在它应该怎样工作。