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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 4bf789e981af0836c41daa16e57ef86c21497faa Maintainer: FishDrowned Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<sect1 xml:id="language.errors.php7" xmlns="http://docbook.org/ns/docbook">
<title>PHP 7 错误处理</title>
<para>
PHP 7 改变了大多数错误的报告方式。不同于传统（PHP 5）的错误报告机制，现在大多数错误被作为
<classname>Error</classname> 异常抛出。
</para>
<para>
这种 <classname>Error</classname> 异常可以像 <classname>Exception</classname>
异常一样被第一个匹配的 <literal>try</literal> / <literal>catch</literal>
块所捕获。如果没有匹配的
<link linkend="language.exceptions.catch"><literal>catch</literal></link>
块，则调用异常处理函数（事先通过 <function>set_exception_handler</function> 注册）进行处理。
如果尚未注册异常处理函数，则按照传统方式处理：被报告为一个致命错误（Fatal Error）。
</para>
<para>
<classname>Error</classname> 类并非继承自 <classname>Exception</classname>
类，所以不能用 <code>catch (Exception $e) { ... }</code> 来捕获
<classname>Error</classname>。你可以用
<code>catch (Error $e) { ... }</code>，或者通过注册异常处理函数（
<function>set_exception_handler</function>）来捕获 <classname>Error</classname>。
</para>
<sect2 xml:id="language.errors.php7.hierarchy">
<title><classname>Error</classname> 层次结构</title>
<itemizedlist>
<listitem>
<simpara><classname>Throwable</classname></simpara>
<itemizedlist>
<listitem>
<simpara><classname>Error</classname></simpara>
<itemizedlist>
<listitem>
<simpara><classname>ArithmeticError</classname></simpara>
<itemizedlist>
<listitem>
<simpara><classname>DivisionByZeroError</classname></simpara>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<simpara><classname>AssertionError</classname></simpara>
</listitem>
<listitem>
<simpara><classname>CompileError</classname></simpara>
<itemizedlist>
<listitem>
<simpara><classname>ParseError</classname></simpara>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<simpara><classname>TypeError</classname></simpara>
<itemizedlist>
<listitem>
<simpara><classname>ArgumentCountError</classname></simpara>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<simpara><classname>ValueError</classname></simpara>
</listitem>
<listitem>
<simpara><classname>UnhandledMatchError</classname></simpara>
</listitem>
<listitem>
<simpara><classname>FiberError</classname></simpara>
</listitem>
<listitem>
<simpara><classname>RequestParseBodyException</classname></simpara>
</listitem>
</itemizedlist>
</listitem>
<listitem>
<simpara><classname>Exception</classname></simpara>
<itemizedlist>
<listitem>
<simpara>...</simpara>
</listitem>
</itemizedlist>
</listitem>
</itemizedlist>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->