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<?xml version='1.0' encoding="utf-8"?>
<!-- $Revision: 297078 $ -->
<refentry xml:id="function.idate" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>idate</refname>
<refpurpose>Format a local time/date as integer</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>idate</methodname>
<methodparam><type>string</type><parameter>format</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>timestamp</parameter><initializer>time()</initializer></methodparam>
</methodsynopsis>
<para>
Returns a number formatted according to the given format string using the
given integer <parameter>timestamp</parameter> or the current local time
if no timestamp is given. In other words, <parameter>timestamp</parameter>
is optional and defaults to the value of <function>time</function>.
</para>
<para>
Unlike the function <function>date</function>, <function>idate</function>
accepts just one char in the <parameter>format</parameter> parameter.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>format</parameter></term>
<listitem>
<para>
<table>
<title>The following characters are recognized in the
<parameter>format</parameter> parameter string</title>
<tgroup cols="2">
<thead>
<row>
<entry><parameter>format</parameter> character</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry><literal>B</literal></entry>
<entry>Swatch Beat/Internet Time</entry>
</row>
<row>
<entry><literal>d</literal></entry>
<entry>Day of the month</entry>
</row>
<row>
<entry><literal>h</literal></entry>
<entry>Hour (12 hour format)</entry>
</row>
<row>
<entry><literal>H</literal></entry>
<entry>Hour (24 hour format)</entry>
</row>
<row>
<entry><literal>i</literal></entry>
<entry>Minutes</entry>
</row>
<row>
<entry><literal>I</literal> (uppercase i)</entry>
<entry>returns <literal>1</literal> if DST is activated,
<literal>0</literal> otherwise</entry>
</row>
<row>
<entry><literal>L</literal> (uppercase l)</entry>
<entry>returns <literal>1</literal> for leap year,
<literal>0</literal> otherwise</entry>
</row>
<row>
<entry><literal>m</literal></entry>
<entry>Month number</entry>
</row>
<row>
<entry><literal>s</literal></entry>
<entry>Seconds</entry>
</row>
<row>
<entry><literal>t</literal></entry>
<entry>Days in current month</entry>
</row>
<row>
<entry><literal>U</literal></entry>
<entry>Seconds since the Unix Epoch - January 1 1970 00:00:00 UTC -
this is the same as <function>time</function></entry>
</row>
<row>
<entry><literal>w</literal></entry>
<entry>Day of the week (<literal>0</literal> on Sunday)</entry>
</row>
<row>
<entry><literal>W</literal></entry>
<entry>ISO-8601 week number of year, weeks starting on
Monday</entry>
</row>
<row>
<entry><literal>y</literal></entry>
<entry>Year (1 or 2 digits - check note below)</entry>
</row>
<row>
<entry><literal>Y</literal></entry>
<entry>Year (4 digits)</entry>
</row>
<row>
<entry><literal>z</literal></entry>
<entry>Day of the year</entry>
</row>
<row>
<entry><literal>Z</literal></entry>
<entry>Timezone offset in seconds</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
</listitem>
</varlistentry>
&date.timestamp.description;
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns an <type>integer</type>.
</para>
<para>
As <function>idate</function> always returns an <type>integer</type> and
as they can't start with a "0", <function>idate</function> may return
fewer digits than you would expect. See the example below.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
&date.timezone.errors.description;
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&date.timezone.errors.changelog;
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>idate</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$timestamp = strtotime('1st January 2004'); //1072915200
// this prints the year in a two digit format
// however, as this would start with a "0", it
// only prints "4"
echo idate('y', $timestamp);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>date</function></member>
<member><function>getdate</function></member>
<member><function>time</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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