PHP function workaround cannot be called after registerphpfunctions in xsltprocessor _php tutorial

XSLT is a very handy tool for translating XML, which is implemented through xsltprocessor, with many useful functions built into the XSLT, and only the Registerphpfunctions method that calls the Xsltprocessor instance, I We can use PHP's functions directly in XSLT, which greatly enhances the processing power of XSLT.

However, when using PHP functions in XSLT, many people encounter the following two types of errors:

(1) warning:xsltprocessor::transformtoxml (): Xmlxpathcompiledeval:1 objects left O
n the stack.
(2) PHP warning:xsltprocessor::transformtoxml (): xmlxpathcompopeval:function func
tion bound to undefined prefix php in ....

The code is as follows	Copy Code
$xml = << Bob Joe EOB; $xsl = << Xmlns:xsl= "Http://www.w3.org/1999/XSL/Transform" > Users select= "php:function (' Ucfirst ', string (UID))"/> EOB; $xmldoc = Domdocument::loadxml ($xml); $xsldoc = Domdocument::loadxml ($xsl); $proc = new Xsltprocessor (); $proc->registerphpfunctions (); $proc->importstylesheet ($xsldoc); echo $proc->transformtoxml ($xmldoc); ?>

In fact, this error occurs because we don't have a PHP namespace defined, just

The code is as follows	Copy Code
Xmlns:xsl= "Http://www.w3.org/1999/XSL/Transform" >

Add xmlns:php= "http://php.net/xsl" to solve this problem, that is,

The code is as follows	Copy Code
Xmlns:xsl= "Http://www.w3.org/1999/XSL/Transform" xmlns:php= "Http://php.net/xsl" >

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