Add additional test

ext/xsl/tests/xsltprocessor_exsl_registerPhpFunctionNs.phpt

@@ -0,0 +1,62 @@
+--TEST--
+Overriding an EXSLT builtin
+--EXTENSIONS--
+xsl
+--SKIPIF--
+<?php
+$proc = new xsltprocessor;
+if (!$proc->hasExsltSupport()) die('skip EXSLT support not available');
+if (LIBXSLT_VERSION < 10130) die('skip too old libxsl');
+?>
+--FILE--
+<?php
+
+function dummy_year($input) {
+    var_dump($input[0]->textContent);
+    return 'dummy value';
+}
+
+function dummy_exit($input) {
+    var_dump($input);
+    exit("dummy exit");
+}
+
+$xsl = <<<XML
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<xsl:stylesheet version="1.0" 
+                xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                xmlns:date="http://exslt.org/dates-and-times"
+                extension-element-prefixes="date">
+<xsl:output method="text"/>
+<xsl:template match="date"><xsl:value-of select="date:year(@date)"/></xsl:template>
+</xsl:stylesheet>
+XML;
+
+$xml = <<<XML
+<?xml version="1.0"?>
+<page><date date="2007-12-31"/></page>
+XML;
+
+$xsldoc = new DOMDocument();
+$xsldoc->loadXML($xsl);
+
+$xmldoc = new DOMDocument();
+$xmldoc->loadXML($xml);
+
+$proc = new XSLTProcessor();
+$proc->importStylesheet($xsldoc);
+
+// Should override the builtin function
+$proc->registerPHPFunctionNS('http://exslt.org/dates-and-times', 'year', dummy_year(...));
+echo $proc->transformToXML($xmldoc), "\n";
+
+// Should not exit
+$proc->registerPHPFunctionNS('http://www.w3.org/1999/XSL/Transform', 'value-of', dummy_exit(...));
+echo $proc->transformToXML($xmldoc), "\n";
+
+?>
+--EXPECT--
+string(10) "2007-12-31"
+dummy value
+string(10) "2007-12-31"
+dummy value