restore-error-handler.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 4a6671fe697ead5b27603b56face01a2c4e7ebe5 Maintainer: daijie Status: ready -->
<!-- CREDITS: mowangjuanzi, Luffy -->
<refentry xml:id="function.restore-error-handler" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>restore_error_handler</refname>
  <refpurpose>还原之前的错误处理函数</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>true</type><methodname>restore_error_handler</methodname>
   <void/>
  </methodsynopsis>
  <para>
   
   在使用 <function>set_error_handler</function> 改变错误处理函数之后，此函数可以
   用于还原之前的错误处理程序(可以是内置的或者也可以是用户所定义的函数)。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  &no.function.parameters;
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.true.always;
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>restore_error_handler</function> 范例</title>
    <para>
     如果是 <function>unserialize</function> 导致了一个错误，接下来
     会恢复原来的错误处理函数。
    </para>
    <programlisting role="php">
<![CDATA[
<?php
function unserialize_handler($errno, $errstr)
{
    echo "Invalid serialized value.\n";
}

$serialized = 'foo';
set_error_handler('unserialize_handler');
$original = unserialize($serialized);
restore_error_handler();
?>
]]>
    </programlisting>
    &example.outputs;
    <screen>
<![CDATA[
Invalid serialized value.
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>error_reporting</function></member>
    <member><function>set_error_handler</function></member>
    <member><function>get_error_handler</function></member>
    <member><function>restore_exception_handler</function></member>
    <member><function>trigger_error</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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