使用标题和说明的组合框搜索 XML

Question

嗨，我尝试使用组合框搜索XML文档，以便用户可以搜索描述或标题。我已将XML文件加载到我希望显示搜索的页面。搜索框本身附加到顶部.php文档。我尝试存储变量并将它们应用于 XML 搜索字符串。我收到以下错误，但不确定如何继续。

警告：SimpleXMLElement：：xpath(( [simplexmlelement.xpath]：/var/www/vhosts/numyspace.co.uk/web_users/home/~unn_w11034582/public_html/web/searchResults.php 第 19 行中的无效表达式

警告：在第 22 行的/var/www/vhosts/numyspace.co.uk/web_users/home/~unn_w11034582/public_html/web/searchResults.php 中为 foreach(( 提供的参数无效

搜索结果.php

 <?php
include "top.php";
$holidaysXML = simplexml_load_file('holidays.xml');

if(isset($_POST["txtSearch"]) && $_POST["txtSearch"] != "Holiday Search..." && $_POST["txtSearch"] !="")
    {
        $txtSearch = $_POST["txtSearch"];
        $searchOption = $_POST["searchOption"];
        if($_POST["searchOption"] != "null")
        {
            $searchOption = $_POST["searchOption"];
            $searchedResult = "Search results for "$txtSearch" in $searchOption";
            $resultsHoliday = "channel/item [contains($searchOption, "$txtSearch")]";
        }
    }
    $allHolidays = $holidaysXML->xpath($resultsHoliday);

            foreach ($allHolidays as $currentHoliday) 
            {
                        echo "<a href= "{$currentHoliday->link}" style="font-weight:normal" target="_blank">{$currentHoliday->title}</a><br>";
                        echo "{$currentHoliday->pubDate}<br>";
                        echo "{$currentHoliday->description}";
            }
This is where the information is gathered from the user on top.php
    <form action = "searchResults.php" method = "post">
                    <input type = "text" name = "txtSearch" value = "Holiday Search...">
                       <select name = "searchOption">
                       <option value = "null" selected>(select)</option>
                       <option value = "title">Title</option>
                       <option value = "description">Description</option>
                       </select>
                    <input type = "submit" name = "search" value = "Search">
                </form>             

Answer 1

您看到的第一个问题是由于。

Holidays = $holidaysXML->xpath($searchedResult);

应该是：

Holidays = $holidaysXML->xpath($resultsHoliday);

因为$resultsHoliday是保存 XPath 查询的变量。