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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.ini-set" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>ini_set</refname>
<refpurpose>Sets the value of a configuration option</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>string</type><type>false</type></type><methodname>ini_set</methodname>
<methodparam><type>string</type><parameter>option</parameter></methodparam>
<methodparam><type class="union"><type>string</type><type>int</type><type>float</type><type>bool</type><type>null</type></type><parameter>value</parameter></methodparam>
</methodsynopsis>
<para>
Sets the value of the given configuration option. The configuration option
will keep this new value during the script's execution, and will be restored
at the script's ending.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>option</parameter></term>
<listitem>
<para>
</para>
<para>
Not all the available options can be changed using
<function>ini_set</function>. There is a list of all available options
in the <link linkend="ini.list">appendix</link>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>value</parameter></term>
<listitem>
<para>
The new value for the option.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the old value on success, &false; on failure.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.1.0</entry>
<entry>
<parameter>value</parameter> now accepts any scalar type (including &null;).
Previously, only &string; values were accepted.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Setting an ini option</title>
<programlisting role="php">
<![CDATA[
<?php
echo ini_get('display_errors');
if (!ini_get('display_errors')) {
ini_set('display_errors', '1');
}
echo ini_get('display_errors');
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>get_cfg_var</function></member>
<member><function>ini_get</function></member>
<member><function>ini_get_all</function></member>
<member><function>ini_restore</function></member>
<member>
<link linkend="configuration.changes">How to change configuration settings</link>
</member>
</simplelist>
</para>
</refsect1>
</refentry>
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