关于xml：当transformToXML返回为false并且libxml_get_errors不返回任何内容时，如何使用PHP XSLTProcessor查找问题


How to find problem with PHP XSLTProcessor when return from transformToXML is false and libxml_get_errors returns nothing

我正在使用下面的代码，以允许无法执行XSL转换的HTTP用户代理查看服务器上的资源。我很迷惑，因为transformToXML的结果是false，但是libxml_get_errors()的结果是一个空数组。如您所见，代码输出了LibXSLT版本ID，而我在版本1.1.24的WinVista上遇到了问题。 libxml_get_errors()不是从XSLTProcessor对象获取错误的正确函数吗？

如果您对XML文档感兴趣，可以从http://bobberinteractive.com/index.xhtml和... / stylesheets / layout.xsl

获取。

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<wyn>
<?php
//redirect browsers that can handle the source files.
if (strpos ( $_SERVER ['HTTP_ACCEPT'], 'application/xhtml+xml' )) {
 header ("HTTP/1.1 301 Moved Permanently" );
 header ("Location: http://" . $_SERVER ['SERVER_NAME'] ."/index.xhtml" );
 header ("Content-Type: text/text" );
 echo"\
Your browser is capable of processing the  site contents on its own.";
 die ();
}
//start by checking the template
$baseDir = dirname ( __FILE__ );
$xslDoc = new DOMDocument ();
if (! $xslDoc->load ( $baseDir . '/stylesheets/layout.xsl' )) {
 header ("HTTP/1.1 500 Server Error" );
 header ("Content-Type: text/plain" );
 echo"\
 Can't load" . $baseDir . '/stylesheets/layout.xsl';
 die ();
}

//resolve the requested resource (browsers that need transformation will request the resource without the suffix)
$uri = $_SERVER ['REQUEST_URI'];
$len = strlen ( $uri );
if (1 >= $len || '/' == substr ( $uri, $len - 1 )) {
 $fileName = $baseDir ."/index.xhtml"; // use 'default' document if pathname ends in '/'
} else {
 $fileName = $baseDir . (1 load ( $fileName )) {
 header ("HTTP/1.1 500 Server Error" );
 echo"\
 Can't load" . $fileName;
 die ();
}
// now start the XSL template processing
$proc = new XSLTProcessor ();
$proc->importStylesheet ( $xslDoc );
$doc = $proc->transformToXML ( $xmlDoc );
if (false === $doc) {
 header ("HTTP/1.1 500 Server Error" );
 header ("Content-Type: text/plain" );
 echo"\
";
 // HERE is where it gets strange: the value of $doc is false and libxml_get_errors returns 0 entries.
 display_xml_errors ( libxml_get_errors() );
 die ();
}
header ("Content-Type: text/html" );
echo"\
";
echo $doc;

function display_xml_errors($errors) {
 echo count ( $errors ) ." Error(s) from LibXSLT" . LIBXSLT_DOTTED_VERSION;
 for($i = 0; $i level) {
   case LIBXML_ERR_WARNING :
    $return .="Warning $error->code:";
    break;
   case LIBXML_ERR_ERROR :
    $return .="Error $error->code:";
    break;
   case LIBXML_ERR_FATAL :
    $return .="Fatal Error $error->code:";
    break;
  }

  $return .= trim ( $error->message ) ."\
  Line: $error->line" ."\
  Column: $error->column";

  if ($error->file) {
   $return .="\
  File: $error->file";
  }

  echo"$return\
\
--------------------------------------------\
\
";
 }
}
</wyn>
相关讨论

加载XML或执行XSL时出现几个错误。升级您的error_reporting级别

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error_reporting(E_ALL | E_STRICT);
// or
error_reporting(-1); // overzealous, but works

认识我：

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PHP Warning:  DOMDocument::load(): Entity 'ndash' not defined in /tmp/index.xhtml, line: 8 in /tmp/test.php on line 4
PHP Warning:  XSLTProcessor::importStylesheet(): compilation error: file /tmp/layout.xsl line 59 element a in /tmp/test.php on line 10
PHP Warning:  XSLTProcessor::importStylesheet(): Attribute 'onclick': The content is expected to be a single text node when compiling an AVT. in /tmp/test.php on line 10
PHP Warning:  XSLTProcessor::importStylesheet(): compilation error: file /tmp/layout.xsl line 185 element a in /tmp/test.php on line 10
PHP Warning:  XSLTProcessor::importStylesheet(): Attribute 'onclick': The content is expected to be a single text node when compiling an AVT. in /tmp/test.php on line 10
PHP Warning:  XSLTProcessor::transformToXml(): No stylesheet associated to this object in /tmp/test.php on line 12

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