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<title>Draws an arc</title>
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<div class="refnamediv">
<h1 class="refname">imagearc</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">imagearc</span> — <span class="dc-title">Draws an arc</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.imagearc-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>imagearc</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$cx</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$cy</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$width</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$height</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$start</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$end</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$color</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>imagearc()</strong></span> draws an arc of circle centered at the given
coordinates.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.imagearc-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">
image</code></em></span><dd>
<p class="para">An image resource, returned by one of the image creation functions,
such as <span class="function"><a href="function.imagecreatetruecolor.html" class="function">imagecreatetruecolor()</a></span>.</p></dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">cx</code></em></span>
<dd>
<p class="para">
x-coordinate of the center.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">cy</code></em></span>
<dd>
<p class="para">
y-coordinate of the center.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">width</code></em></span>
<dd>
<p class="para">
The arc width.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">height</code></em></span>
<dd>
<p class="para">
The arc height.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">start</code></em></span>
<dd>
<p class="para">
The arc start angle, in degrees.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">end</code></em></span>
<dd>
<p class="para">
The arc end angle, in degrees.
0° is located at the three-o'clock position, and the arc is drawn
clockwise.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">color</code></em></span>
<dd>
<p class="para">
A color identifier created with
<span class="function"><a href="function.imagecolorallocate.html" class="function">imagecolorallocate()</a></span>.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.imagearc-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.imagearc-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3180">
<p><strong>Example #1 Drawing a circle with <span class="function"><strong>imagearc()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br /></span><span style="color: #FF8000">// create a 200*200 image<br /></span><span style="color: #0000BB">$img </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// allocate some colors<br /></span><span style="color: #0000BB">$white </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$red </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$green </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$blue </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">255</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// draw the head<br /></span><span style="color: #0000BB">imagearc</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">360</span><span style="color: #007700">, </span><span style="color: #0000BB">$white</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// mouth<br /></span><span style="color: #0000BB">imagearc</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #0000BB">150</span><span style="color: #007700">, </span><span style="color: #0000BB">150</span><span style="color: #007700">, </span><span style="color: #0000BB">25</span><span style="color: #007700">, </span><span style="color: #0000BB">155</span><span style="color: #007700">, </span><span style="color: #0000BB">$red</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// left and then the right eye<br /></span><span style="color: #0000BB">imagearc</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">, </span><span style="color: #0000BB">60</span><span style="color: #007700">, </span><span style="color: #0000BB">75</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">360</span><span style="color: #007700">, </span><span style="color: #0000BB">$green</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagearc</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">, </span><span style="color: #0000BB">140</span><span style="color: #007700">, </span><span style="color: #0000BB">75</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">50</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">360</span><span style="color: #007700">, </span><span style="color: #0000BB">$blue</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// output image in the browser<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"Content-type: image/png"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// free memory<br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output
something similar to:</p></div>
<div class="mediaobject">
<div class="imageobject">
<img src="images/21009b70229598c6a80eef8b45bf282b-imagearc.png" alt="Output of example : Drawing a circle with imagearc()" width="200" height="200" />
</div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.imagearc-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.imagefilledarc.html" class="function" rel="rdfs-seeAlso">imagefilledarc()</a> - Draw a partial arc and fill it</span></li>
<li class="member"> <span class="function"><a href="function.imageellipse.html" class="function" rel="rdfs-seeAlso">imageellipse()</a> - Draw an ellipse</span></li>
<li class="member"> <span class="function"><a href="function.imagefilledellipse.html" class="function" rel="rdfs-seeAlso">imagefilledellipse()</a> - Draw a filled ellipse</span></li>
</ul>
</p>
</div>
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