在XML文件中搜索多个元素(Searching Multiple Elements In XML File)

 我正在使用此处的W3C Live Ajax搜索。 他们的代码只搜索一个元素，即“标题”。 我想让用户的查询和搜索多个元素，例如'title'和'url'。 
 
<?php
$xmlDoc=new DOMDocument();
$xmlDoc->load("live.xml");

$x=$xmlDoc->getElementsByTagName('link');

//get the q parameter from URL
$q=$_GET["q"];

//lookup all links from the xml file if length of q>0
if (strlen($q)>0)
{
$hint="";
for($i=0; $i<($x->length); $i++)
  {
  $d=$x->item($i)->getElementsByTagName('title');
  $z=$x->item($i)->getElementsByTagName('url');
  if ($d->item(0)->nodeType==1)
    {
    //find a link matching the search text
    if (stristr($d->item(0)->childNodes->item(0)->nodeValue,$q) !=false)   
      {
      if ($hint=="")
        {
        $hint=
        $z->item(0)->childNodes->item(0)->nodeValue . "<br />" . 
        $d->item(0)->childNodes->item(0)->nodeValue;
        }
      else
        {
        $hint=$hint . "<br /><br />" .
        $z->item(0)->childNodes->item(0)->nodeValue . "<br />" .  
        $d->item(0)->childNodes->item(0)->nodeValue;
        }
      }
    }
  }
}

// Set output to "no suggestion" if no hint were found
// or to the correct values
if ($hint=="")
  {
  $response="no suggestion";
  }
else
  {
  $response=$hint;
  }

//output the response
echo $response;

?> 
 
 有人能给我一个如何让它工作的例子吗？ 根据我的理解，stristr只搜索一个haystack，你不能使用数组，那么还有另一种方法吗？ 提前致谢！ 

I'm using the W3C Live Ajax Search found here. Their code only searches one element, the "title". I would like to have it take the user's query and search through multiple elements, for example, the 'title' and the 'url'. 
 
<?php
$xmlDoc=new DOMDocument();
$xmlDoc->load("live.xml");

$x=$xmlDoc->getElementsByTagName('link');

//get the q parameter from URL
$q=$_GET["q"];

//lookup all links from the xml file if length of q>0
if (strlen($q)>0)
{
$hint="";
for($i=0; $i<($x->length); $i++)
  {
  $d=$x->item($i)->getElementsByTagName('title');
  $z=$x->item($i)->getElementsByTagName('url');
  if ($d->item(0)->nodeType==1)
    {
    //find a link matching the search text
    if (stristr($d->item(0)->childNodes->item(0)->nodeValue,$q) !=false)   
      {
      if ($hint=="")
        {
        $hint=
        $z->item(0)->childNodes->item(0)->nodeValue . "<br />" . 
        $d->item(0)->childNodes->item(0)->nodeValue;
        }
      else
        {
        $hint=$hint . "<br /><br />" .
        $z->item(0)->childNodes->item(0)->nodeValue . "<br />" .  
        $d->item(0)->childNodes->item(0)->nodeValue;
        }
      }
    }
  }
}

// Set output to "no suggestion" if no hint were found
// or to the correct values
if ($hint=="")
  {
  $response="no suggestion";
  }
else
  {
  $response=$hint;
  }

//output the response
echo $response;

?> 
 
Can somebody give me an example of how to make it work? From what I understand, stristr will only search one haystack and you can't use arrays, so is there another way? Thanks in advance!

原文：https://stackoverflow.com/questions/13941629