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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.imagepolygon" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>imagepolygon</refname>
<refpurpose>Draws a polygon</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<simpara>Signature as of PHP 8.0.0 (not supported with named arguments)</simpara>
<methodsynopsis>
<type>bool</type><methodname>imagepolygon</methodname>
<methodparam><type>GdImage</type><parameter>image</parameter></methodparam>
<methodparam><type>array</type><parameter>points</parameter></methodparam>
<methodparam><type>int</type><parameter>color</parameter></methodparam>
</methodsynopsis>
<simpara>Alternative signature (deprecated as of PHP 8.1.0)</simpara>
<methodsynopsis>
<type>bool</type><methodname>imagepolygon</methodname>
<methodparam><type>GdImage</type><parameter>image</parameter></methodparam>
<methodparam><type>array</type><parameter>points</parameter></methodparam>
<methodparam><type>int</type><parameter>num_points</parameter></methodparam>
<methodparam><type>int</type><parameter>color</parameter></methodparam>
</methodsynopsis>
<para>
<function>imagepolygon</function> creates a polygon in the given
<parameter>image</parameter>.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
&gd.image.description;
<varlistentry>
<term><parameter>points</parameter></term>
<listitem>
<para>
An array containing the polygon's vertices, e.g.:
<informaltable>
<tgroup cols="2">
<tbody>
<row>
<entry>points[0]</entry>
<entry>= x0</entry>
</row>
<row>
<entry>points[1]</entry>
<entry>= y0</entry>
</row>
<row>
<entry>points[2]</entry>
<entry>= x1</entry>
</row>
<row>
<entry>points[3]</entry>
<entry>= y1</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>num_points</parameter></term>
<listitem>
<para>
Total number of points (vertices), which must be at least 3.
</para>
<simpara>
If this parameter is omitted as per the second signature, <parameter>points</parameter>
must have an even number of elements, and <parameter>num_points</parameter> is
assumed to be <code>count($points)/2</code>.
</simpara>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>color</parameter></term>
<listitem>
<para>
&gd.identifier.color;
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</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>
The parameter <parameter>num_points</parameter> has been deprecated.
</entry>
</row>
&gd.changelog.image-param;
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>imagepolygon</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
// Create a blank image
$image = imagecreatetruecolor(400, 300);
// Allocate a color for the polygon
$col_poly = imagecolorallocate($image, 255, 255, 255);
// Draw the polygon
imagepolygon($image, array(
0, 0,
100, 200,
300, 200
),
3,
$col_poly);
// Output the picture to the browser
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
?>
]]>
</programlisting>
&example.outputs.similar;
<mediaobject>
<alt>Output of example : imagepolygon()</alt>
<imageobject>
<imagedata fileref="en/reference/image/figures/imagepolygon.png"/>
</imageobject>
</mediaobject>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><function>imagefilledpolygon</function></member>
<member><function>imageopenpolygon</function></member>
<member><function>imagecreate</function></member>
<member><function>imagecreatetruecolor</function></member>
</simplelist>
</refsect1>
</refentry>
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