使用Xpath检索所选记录

我正在使用下面的脚本创建一个“图库”页面。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<?php 

    //This variable specifies relative path to the folder, where the gallery with uploaded files is located. 

    $galleryPath = 'UploadedFiles/'; 

    $thumbnailsPath = $galleryPath . 'Thumbnails/'; 

    $absGalleryPath = realpath($galleryPath) . DIRECTORY_SEPARATOR; 

    $descriptions = new DOMDocument('1.0'); 
    $descriptions->load($absGalleryPath . 'files.xml'); 

    path="files[userid=1]/originalname/folder/description/source/thumbnail"; 
// code for IE 
if (window.ActiveXObject) 
{ 
var nodes=xml.selectNodes(path); 

for (i=0;i<nodes.length;i++) 
    { 
    document.write(nodes[i].childNodes[0].nodeValue); 
    } 
} 

?> 
<head> 
    <title>Gallery</title> 
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 
    <link href="Libraries/fancybox/jquery.fancybox-1.3.1.css" rel="stylesheet" type="text/css" /> 
    <link href="Styles/style.css" rel="stylesheet" type="text/css" /> 
    <!--[if IE]> 
    <link href="Styles/ie.css" rel="stylesheet" type="text/css" /> 
    <![endif]--> 
    <script src="Libraries/jquery/jquery-1.4.3.min.js" type="text/javascript"></script> 
    <script src="Libraries/fancybox/jquery.fancybox-1.3.1.pack.js" type="text/javascript"></script> 
    <script type="text/javascript"> 

    $(function() { $('a.fancybox').fancybox(); }); 

    </script> 
    <style type="text/css"> 
<!-- 
.style1 { 
    font-size: 14px; 
    margin-right: 110px; 
} 
.style4 {font-size: 12px} 
--> 
    </style> 
</head> 
<body style="font-family: Calibri; color: #505050; font-size: 9px; border-bottom-width: thin; margin-top: 5px; margin-left: -475px; margin-right: 1px; margin-bottom: -10px;"> 
<div align="right" class="style1"> <a href = "imagefolders.php" /> View Uploaded Images In Folder Structure <a/> &larr; View All Uploaded Images </div> 
    <form id="gallery" class="page"> 
    <div id="container"> 
    <div id="center"> 
     <div class="aB"> 
     <div class="aB-B"> 
      <?php if ('Uploaded files' != $current['title']) :?> 
      <?php endif;?> 
      <label> 
      <input name="userid" type="text" id="userid" value="1" /> 
      <input name="locationid" type="text" id="locationid" value="1" /> 
      </label> 
      <div class="demo"> 
      <div class="inner"> 
       <div class="container"> 
       <div class="gallery"> 
        <ul class="gallery-image-list"> 
        <?php for ($i = 0; $i < $descriptions->documentElement->childNodes->length; $i++) : 
          $xmlFile = $descriptions->documentElement->childNodes->item($i); 
          $name = htmlentities($xmlFile->getAttribute('originalname'), ENT_COMPAT, 'UTF-8'); 
          $description = htmlentities($xmlFile->getAttribute('description'), ENT_COMPAT, 'UTF-8'); 
          $folder = htmlentities($xmlFile->getAttribute('folder'), ENT_COMPAT, 'UTF-8'); 
          $source = $galleryPath . rawurlencode($xmlFile->getAttribute('source')); 
          $thumbnail = $thumbnailsPath . rawurlencode($xmlFile->getAttribute('thumbnail')); 
        ?> 
        <li class="item"> 
         <a class="fancybox" target="_blank" rel="original" href="<?php echo $source; ?>"><img class="preview" 
         alt="<?php echo $name; ?>" src="<?php echo $thumbnail; ?>" /></a>      </li> 
         <li class="item"></li> 
         <p><span class="style4"><b>Image Description:</b> <?php echo htmlentities($xmlFile->getAttribute('description'));?> <br /> 
          <b>Image contained in folder:</b> <?php echo htmlentities($xmlFile->getAttribute('folder'));?> </span><br /> 
          <?php endfor; ?> 
          </li> 
        </p> 
        </ul> 
       </div> 
       </div> 
      </div> 
      </div> 
     </div> 
     </div> 
    </div> 
    </div> 
     <div class="aB-a">  </div> 
     </div> 
    </div> 
    </div> 
    </form> 
</body> 
</html>

此页面的数据来自文件'files.xml'，其中的摘录可以在下面找到。

<?xml version="1.0" encoding="utf-8" ?> 
- <files> 
    <file name="Test 1/article-0-07D01B74000005DC-138_468x617.jpg" source="article-0-07D01B74000005DC-138_468x617.jpg" size="143110" originalname="article-0-07D01B74000005DC-138_468x617.jpg" thumbnail="article-0-07D01B74000005DC-138_468x617.jpg" description="No description provided" userid="1" locationid="1" folder="Test_1" /> 
    </files>

我想要做的是过滤返回的记录，是由“用户ID”和“locationid”和用于测试目的更具体的这些有“1”的值。

我从XML 'Select Where' Statement这个网站获得了一些有用的指导，并且从我读过的后续'XPath'教程中，我将我认为是正确的xpath代码放在一起，这是我的顶部'画廊'页脚本。

然而，当我试图运行此我收到以下错误：

Parse error: syntax error, unexpected '=' in /homepages/2/d333603417/htdocs/development/gallery.php on line 16

很显然，这个问题是与“等于”，但是当我又回到了教程，这似乎是正确的语法使用。

我只是想知道是否有人可以看看这个请让我知道我哪里出了问题。

非常感谢

修订后的XPath代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<?php 

    $galleryPath = 'UploadedFiles/'; 

    $thumbnailsPath = $galleryPath . 'Thumbnails/'; 

    $absGalleryPath = realpath($galleryPath) . DIRECTORY_SEPARATOR; 

    $descriptions = new DOMDocument('1.0'); 
    $descriptions->load($absGalleryPath . 'files.xml'); 

    /files/file[@userid="1" and @locationid="1"]; 


?>

来源

2012-03-17 IRHM

16号线是

path="files[userid=1]/originalname/folder/description/source/thumbnail";

如果这是PHP代码，你需要$path之前。

该行下方的代码似乎是Javascript。所以，你应该通过PHP变量$路径进入的Javascript语法，如：

var path = "<?=$path ?>";

HTH，

来源

2012-03-17 16:53:01

你好，非常感谢这一点。我必须承认，在这里我的深度已经相当大，因为除了我已经有的脚本之外，我不确定我需要包括什么。我最初包含的代码来自我一直在努力的一个教程。我刚刚尝试使用'$ path ='文件[userid = 1]/originalname/folder/description/source/thumbnail';'by itslef但不幸的是它仍然检索所有的记录。亲切的问候 – IRHM 2012-03-17 18:13:36

不清楚你是如何使查询“文件[userid = 1] /原始名称/文件夹/说明/源/缩略图”。 – 2012-03-17 23:08:09

从XML中，它看起来像“原始名称”，“文件夹”，“描述”等是“文件”的属性，在这种情况下，查询可能应该像“/ files/file [@ userid =”1“ ]“只是用于userid 1.如果你想通过更多的属性进行搜索，然后”/文件/文件[@ userid =“1”和@ originalname =“somename”]“等等 – 2012-03-17 23:16:49

使用Xpath检索所选记录

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