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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.error-reporting" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>error_reporting</refname>
<refpurpose>Sets which PHP errors are reported</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>error_reporting</methodname>
<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>error_level</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
The <function>error_reporting</function> function sets the
<link linkend="ini.error-reporting">error_reporting</link>
directive at runtime. PHP has many levels of errors, using
this function sets that level for the duration (runtime) of
your script. If the optional <parameter>error_level</parameter> is
not set, <function>error_reporting</function> will just return
the current error reporting level.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>error_level</parameter></term>
<listitem>
<para>
The new <link linkend="ini.error-reporting">error_reporting</link>
level. It takes on either a bitmask, or named constants. Using named
constants is strongly encouraged to ensure compatibility for future
versions. As error levels are added, the range of integers increases,
so older integer-based error levels will not always behave as expected.
</para>
<para>
The available error level constants and the actual
meanings of these error levels are described in the
<link linkend="errorfunc.constants">predefined constants</link>.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the <link linkend="ini.error-reporting">error_reporting</link>
level, <emphasis>before</emphasis> it is changed to
<parameter>error_level</parameter>.
</para>
<note>
<simpara>
The <link linkend="language.operators.errorcontrol">error control</link>
<literal>@</literal>-operator changes the <parameter>error_level</parameter> during error handling.
</simpara>
</note>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
<parameter>error_level</parameter> is nullable now.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>error_reporting</function> examples</title>
<programlisting role="php">
<![CDATA[
<?php
// Turn off all error reporting
error_reporting(0);
// Report simple running errors
error_reporting(E_ERROR | E_WARNING | E_PARSE);
// Reporting E_NOTICE can be good too (to report uninitialized
// variables or catch variable name misspellings ...)
error_reporting(E_ERROR | E_WARNING | E_PARSE | E_NOTICE);
// Report all errors except E_NOTICE
error_reporting(E_ALL & ~E_NOTICE);
// Report all PHP errors
error_reporting(E_ALL);
// Report all PHP errors
error_reporting(-1);
// Same as error_reporting(E_ALL);
ini_set('error_reporting', E_ALL);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<tip>
<simpara>
Passing in the value <literal>-1</literal> will show every possible error,
even when new levels and constants are added in future PHP versions. The
behavior is equivalent to passing <constant>E_ALL</constant> constant.
</simpara>
</tip>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member>The <link linkend="ini.display-errors">display_errors</link> directive</member>
<member>The <link linkend="ini.html-errors">html_errors</link> directive</member>
<member>The <link linkend="ini.xmlrpc-errors">xmlrpc_errors</link> directive</member>
<member>The <link linkend="language.operators.errorcontrol">error control</link> operator</member>
<member><function>ini_set</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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