Xsl/examples-Phpdoc专题

范例

目录

• Example collection.xml and collection.xsl files
• Error handling with libxml error handling functions

Example collection.xml and collection.xsl files

Many examples in this reference require both an XML and an XSL file. We will use collection.xml and collection.xsl that contains the following:

示例 #1 collection.xml

<collection>
 <cd>
  <title>Fight for your mind</title>
  <artist>Ben Harper</artist>
  <year>1995</year>
 </cd>
 <cd>
  <title>Electric Ladyland</title>
  <artist>Jimi Hendrix</artist>
  <year>1997</year>
 </cd>
</collection>

示例 #2 collection.xsl

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:param name="owner" select="'Nicolas Eliaszewicz'"/>
 <xsl:output method="html" encoding="iso-8859-1" indent="no"/>
 <xsl:template match="collection">
  Hey! Welcome to <xsl:value-of select="$owner"/>'s sweet CD collection! 
  <xsl:apply-templates/>
 </xsl:template>
 <xsl:template match="cd">
  <h1><xsl:value-of select="title"/></h1>
  <h2>by <xsl:value-of select="artist"/> - <xsl:value-of select="year"/></h2>
  <hr />
 </xsl:template>
</xsl:stylesheet>

Error handling with libxml error handling functions

libxml offers a number of functions for handling errors, which can be employed to capture and deal with errors in XSLT processing.

示例 #1 fruits.xml

A valid XML file.

<fruits>
 <fruit>Apple</fruit>
 <fruit>Banana</fruit>
 <fruit>Cherry</fruit>
</fruits>

示例 #2 fruits.xsl

Contains an invalid select expression.

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output method="html" encoding="utf-8" indent="no"/>
 <xsl:template match="fruits">
  <ul>
   <xsl:apply-templates/>
  </ul>
 </xsl:template>
 <xsl:template match="fruit">
  <li><xsl:value-of select="THIS IS A DELIBERATE ERROR!"/></li>
 </xsl:template>
</xsl:stylesheet>

示例 #3 Collating and printing errors

The example below captures and displays libxml errors raised when calling XSLTProcessor::importStyleSheet with a stylesheet containing an error.

<?php

$xmldoc = new DOMDocument();
$xsldoc = new DOMDocument();
$xsl = new XSLTProcessor();

$xmldoc->loadXML('fruits.xml');
$xsldoc->loadXML('fruits.xsl');

libxml_use_internal_errors(true);
$result = $xsl->importStyleSheet($xsldoc);
if (!$result) {
    foreach (libxml_get_errors() as $error) {
        echo "Libxml error: {$error->message}\n";
    }
}
libxml_use_internal_errors(false);

if ($result) {
    echo $xsl->transformToXML($xmldoc);
}

?>

以上例程的输出类似于：

Libxml error: Invalid expression

Libxml error: compilation error: file fruits.xsl line 9 element value-of
Libxml error: xsl:value-of : could not compile select expression 'THIS IS A DELIBERATE ERROR!'