解析查询字符串时，面包屑菜单重复链接

Question

我创建了一个面包屑菜单，它获取页面 URL，explodes 每个尾部斜杠（在域之后）之后的文本并将其打印出来。

如果没有向 URL 添加查询字符串，这会正常工作，但是，一旦添加了查询，它就会复制链接：

工作示例：

<?php
    $url = "/parent/child";
    // 1. Get URL
    $crumbs = explode("/", trim($url, '/'));
    // 2. Strip extras
    $build = '';
    // 3. Define int so last item is not a link
    $lastKey = count($crumbs) - 1;
    // 4. Execute loop
    foreach($crumbs as $key => $crumb){
        $build .= '/'.$crumb;
        // format text 
        $crumb = ucfirst(str_replace(array(".php","_"),array(""," "),$crumb) . ' ');
        $crumb = preg_replace('/-/', ' ', $crumb); // remove dashes
        $crumb = trim($crumb); // remove whitespace from before and after string

        $pagename = "child";  

        echo $key < $lastKey
            ? "$crumb /" : $pagename;
    }
?>

以上输出：父/子

这很好。

但是，现在使用查询字符串进行第二个测试（注意$url）：

<?php
    $url = "/parent/child/?=query-string";
    // 1. Get URL
    $crumbs = explode("/", trim($url, '/'));
    // 2. Strip extras
    $build = '';
    // 3. Define int so last item is not a link
    $lastKey = count($crumbs) - 1;
    // 4. Execute loop
    foreach($crumbs as $key => $crumb){
        $build .= '/'.$crumb;
        // format text 
        $crumb = ucfirst(str_replace(array(".php","_"),array(""," "),$crumb) . ' ');
        $crumb = preg_replace('/-/', ' ', $crumb); // remove dashes
        $crumb = trim($crumb); // remove whitespace from before and after string

        $pagename = "parent";  

        echo $key < $lastKey
            ? "$crumb   /" : $pagename;
    }
?>

这输出：父/子/父 预期输出：**父/子**

我知道我设置了$pagename = "parent"，但我希望它忽略查询字符串。

我尝试了以下方法：

$crumbs = explode("/", trim($_SERVER["REQUEST_URI"], '/'));
$crumbs = preg_replace('/\?.*/', '', $crumbs);

还是一样的结果。

最新代码：

<?php

    // 1. Get current URL
    $crumbs = trim($_SERVER["REQUEST_URI"]);
    $crumbs = preg_replace('/\?.*/', '', $crumbs);
    $crumbs = explode("/", $crumbs);
    array_filter($crumbs);


    $count = count($crumbs);
    $build = '';

    // 3. Define int so last item is not a link
    $lastKey = count($crumbs) - 1;

    // 4. Execute loop
    foreach($crumbs as $key => $crumb){
        $build .= $crumb;

        // format text 
        $crumb = ucfirst(str_replace(array(".php","_"),array(""," "),$crumb) . ' ');
        $crumb = preg_replace('/-/', ' ', $crumb); // remove dashes
        $crumb = trim($crumb); // remove whitespace from before and after string

        $pagename = get_query_var('pagename');  
        $pagename = the_title('', '', false); // print page name as is in WP
        $pagename = preg_replace('/-/', ' ', $pagename); // remove dashes
        $pagename = trim($pagename);

        echo $key < $lastKey
            ? "<a class='crumbLink' href=".$build.">".$crumb."</a>
               <span class='slash'>/</span>"
            : $pagename;

    }


?>

Answer 1

我认为问题出在：

echo $key < $lastKey ? "$crumb /" : $pagename;

在第 3 步中：

// 3. Define int so last item is not a link
$lastKey = count($crumbs) - 1;

如果您有 3 个项目，则 $lastKey 将为 2，因为您计算 3 个项目并减去 1。

稍后在循环中，最后一项将在 $key = 2 中，所以：

$key = 2 < $lastKey = 2

Answer 2

我们如何从 $url 中删除查询字符串。

<?php
    $url ="/parent/child/";
    $url_arr = parse_url($url);
    if(isset($url_arr['query'])){
    $query = $url_arr['query'];
    $url = str_replace(array($query,'?'), '', $url);
    }
    // 1. Get URL
    $crumbs = explode("/", trim($url, '/'));
    // 2. Strip extras
    $build = '';
    // 3. Define int so last item is not a link
    $lastKey = count($crumbs) - 1;
    // 4. Execute loop
    foreach($crumbs as $key => $crumb){
        $build .= '/'.$crumb;
        // format text
        $crumb = ucfirst(str_replace(array(".php","_"),array(""," "),$crumb) . ' ');
        $crumb = preg_replace('/-/', ' ', $crumb); // remove dashes
        $crumb = trim($crumb); // remove whitespace from before and after string

        $pagename = "parent";

        echo $key < $lastKey
            ? "$crumb   /" : $pagename;
    }
?>

Answer 3

试试

$url = parse_url($_SERVER["REQUEST_URI"], PHP_URL_PATH);

Answer 4

我认为你应该坚持你的第一个“工作”解决方案，但直接使用 parse_url($url, PHP_URL_PATH) 而不是 $url：

<?php
    $url = parse_url("/parent/child?foo=bla&bar=bla", PHP_URL_PATH));
    // 1. Get URL
    $crumbs = explode("/", trim($url, '/'));
    // 2. Strip extras
    $build = '';
    // 3. Define int so last item is not a link
    $lastKey = count($crumbs) - 1;
    // 4. Execute loop
    foreach($crumbs as $key => $crumb){
        $build .= '/'.$crumb;
        // format text 
        $crumb = ucfirst(str_replace(array(".php","_"),array(""," "),$crumb) . ' ');
        $crumb = preg_replace('/-/', ' ', $crumb); // remove dashes
        $crumb = trim($crumb); // remove whitespace from before and after string

        $pagename = "child";  

        echo $key < $lastKey
            ? "$crumb /" : $pagename;
    }
?>

查看手册中有关parse_url()的更多详细信息： https://www.php.net/manual/en/function.parse-url.php