php-doc-en/reference/xslt/functions/xslt-set-error-handler.xml

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<refentry xml:id="function.xslt-set-error-handler" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>xslt_set_error_handler</refname>
  <refpurpose>Set an error handler for a <acronym>XSLT</acronym> processor</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>void</type><methodname>xslt_set_error_handler</methodname>
   <methodparam><type>resource</type><parameter>xh</parameter></methodparam>
   <methodparam><type>mixed</type><parameter>handler</parameter></methodparam>
  </methodsynopsis>
  <para>
   Set an error handler function for the <acronym>XSLT</acronym> processor given by
   <parameter>xh</parameter>, this function will be called whenever an
   error occurs in the <acronym>XSLT</acronym> transformation (this function is also called
   for notices).
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>xh</parameter></term>
     <listitem>
      <para>
       The <acronym>XSLT</acronym> processor link identifier, created with
       <function>xslt_create</function>.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>handler</parameter></term>
     <listitem>
      <para>
       The user function needs to accept four parameters: the <acronym>XSLT</acronym> processor,
       the error level, the error code and an array of messages. The function
       can be shown as:
       <methodsynopsis>
        <methodname><replaceable>error_handler</replaceable></methodname>
        <methodparam><type>resource</type><parameter>xh</parameter></methodparam>
        <methodparam><type>int</type><parameter>error_level</parameter></methodparam>
        <methodparam><type>int</type><parameter>error_code</parameter></methodparam>
        <methodparam><type>array</type><parameter>messages</parameter></methodparam>
       </methodsynopsis>
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.void;
  </para>
 </refsect1>
 
 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title><function>xslt_set_error_handler</function> Example</title>
   <programlisting role="php">
<![CDATA[
<?php

// Our XSLT error handler
function xslt_error_handler($handler, $errno, $level, $info)
{
  // for now, let's just see the arguments
  var_dump(func_get_args());
}

// XML content :
$xml='<?xml version="1.0"?>
<para>
 oops, I misspelled the closing tag
</pata>';

// XSL content :
$xsl='<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
   <strong><xsl:value-of select="para"/></strong>
</xsl:template>
</xsl:stylesheet>';

$xh = xslt_create();

xslt_set_error_handler($xh, "xslt_error_handler");

echo xslt_process($xh, 'arg:/_xml', 'arg:/_xsl',
                  NULL, array("/_xml" => $xml, "/_xsl" => $xsl));

?>
]]>
   </programlisting>
   &example.outputs.similar;
   <screen>
<![CDATA[
array(4) {
  [0]=>
  resource(1) of type (XSLT Processor)
  [1]=>
  int(3)
  [2]=>
  int(0)
  [3]=>
  array(6) {
    ["msgtype"]=>
    string(5) "error"
    ["code"]=>
    string(1) "2"
    ["module"]=>
    string(9) "Sablotron"
    ["URI"]=>
    string(9) "arg:/_xml"
    ["line"]=>
    string(1) "4"
    ["msg"]=>
    string(34) "XML parser error 7: mismatched tag"
  }
}
]]>
   </screen>
  </example>
 </refsect1>
 
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>xslt_set_object</function> if you want to use an
     object method as handler</member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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