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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.imagerotate" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>imagerotate</refname>
<refpurpose>Rotate an image with a given angle</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>GdImage</type><type>false</type></type><methodname>imagerotate</methodname>
<methodparam><type>GdImage</type><parameter>image</parameter></methodparam>
<methodparam><type>float</type><parameter>angle</parameter></methodparam>
<methodparam><type>int</type><parameter>background_color</parameter></methodparam>
</methodsynopsis>
<para>
Rotates the <parameter>image</parameter> image using the given
<parameter>angle</parameter> in degrees.
</para>
<para>
The center of rotation is the center of the image, and the rotated
image may have different dimensions than the original image.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
&gd.image.description;
<varlistentry>
<term><parameter>angle</parameter></term>
<listitem>
<para>
Rotation angle, in degrees. The rotation angle is interpreted as the
number of degrees to rotate the image anticlockwise.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>background_color</parameter></term>
<listitem>
<para>
Specifies the color of the uncovered zone after the rotation
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns an image object for the rotated image, &return.falseforfailure;.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.3.0</entry>
<entry>
The unused <parameter>ignore_transparent</parameter> has been completely removed.
</entry>
</row>
<row>
<entry>8.0.0</entry>
<entry>
On success, this function returns a <classname>GDImage</classname> instance now;
previously, a <type>resource</type> was returned.
</entry>
</row>
&gd.changelog.image-param;
<row>
<entry>8.0.0</entry>
<entry>
The unused <parameter>ignore_transparent</parameter> expects a <type>bool</type> now;
previously it expected an <type>int</type>.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Rotate an image 180 degrees</title>
<para>
This example rotates an image 180 degrees - upside down.
</para>
<programlisting role="php">
<![CDATA[
<?php
// File and rotation
$filename = 'test.jpg';
$degrees = 180;
// Content type
header('Content-type: image/jpeg');
// Load
$source = imagecreatefromjpeg($filename);
// Rotate
$rotate = imagerotate($source, $degrees, 0);
// Output
imagejpeg($rotate);
// Free the memory
imagedestroy($source);
imagedestroy($rotate);
?>
]]>
</programlisting>
&example.outputs.similar;
<mediaobject>
<alt>Output of example : Rotate an image 180 degrees</alt>
<imageobject>
<imagedata fileref="en/reference/image/figures/imagerotate.jpg"/>
</imageobject>
</mediaobject>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
¬e.gd.interpolation;
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><function>imagesetinterpolation</function></member>
</simplelist>
</refsect1>
</refentry>
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