<?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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