php-doc-en/reference/image/functions/imagearc.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.9 $ -->
<!-- splitted from ./en/functions/image.xml, last change in rev 1.36 -->
 <refentry id="function.imagearc">
  <refnamediv>
   <refname>imagearc</refname>
   <refpurpose>Draw a partial ellipse</refpurpose>
  </refnamediv>
  <refsect1>
   <title>Description</title>
    <methodsynopsis>
     <type>bool</type><methodname>imagearc</methodname>
     <methodparam><type>resource</type><parameter>image</parameter></methodparam>
     <methodparam><type>int</type><parameter>cx</parameter></methodparam>
     <methodparam><type>int</type><parameter>cy</parameter></methodparam>
     <methodparam><type>int</type><parameter>w</parameter></methodparam>
     <methodparam><type>int</type><parameter>h</parameter></methodparam>
     <methodparam><type>int</type><parameter>s</parameter></methodparam>
     <methodparam><type>int</type><parameter>e</parameter></methodparam>
     <methodparam><type>int</type><parameter>color</parameter></methodparam>
    </methodsynopsis>
   <para>
    <function>imagearc</function> draws a partial ellipse centered at
    <parameter>cx</parameter>, <parameter>cy</parameter> (top left is
    0, 0) in the image represented by <parameter>image</parameter>.
    <parameter>W</parameter>
    and <parameter>h</parameter> specifies the ellipse's width and
    height respectively while the start and end points are specified
    in degrees indicated by the <parameter>s</parameter> and
    <parameter>e</parameter> arguments. 0&deg; is located at the three-o'clock
    position, and the arc is drawn clockwise.
   </para>
   <example>
    <title>Drawing a circle with <function>imagearc</function></title>
    <programlisting role="php">
<![CDATA[
<?php

// create a 200*200 image
$img = imagecreatetruecolor(200, 200);

// allocate some colors
$white = imagecolorallocate($img, 255, 255, 255);
$black = imagecolorallocate($img, 0, 0, 0);
   
// draw a black circle 
imagearc($img, 100, 100, 150, 150, 0, 360, $black);

// output image in the browser
header("Content-type: image/png");
imagepng($img);
   
// free memory
imagedestroy($img);

?>
]]>
    </programlisting>
   </example>
   <para>
    See also <function>imageellipse</function>,
    <function>imagefilledellipse</function>, and
    <function>imagefilledarc</function>.
   </para>
  </refsect1>
 </refentry>

<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"../../../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->