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이 문서에서는 PHP 중국어 웹사이트 매뉴얼 풀어 주다
libxml offers a number of functions for handling errors, which can be employed to capture and deal with errors in XSLT processing.
Example #1 fruits.xml
A valid XML file.
<fruits> <fruit>Apple</fruit> <fruit>Banana</fruit> <fruit>Cherry</fruit> </fruits>
Example #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>
Example #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 expressionLibxml 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!'