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<div class="refnamediv">
<h1 class="refname">imagesetpixel</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">imagesetpixel</span> — <span class="dc-title">Set a single pixel</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.imagesetpixel-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>imagesetpixel</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$x</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$y</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$color</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>imagesetpixel()</strong></span> draws a pixel at the specified
coordinate.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.imagesetpixel-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">x</code></em></span>
<dd>
<p class="para">
x-coordinate.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">y</code></em></span>
<dd>
<p class="para">
y-coordinate.
</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.imagesetpixel-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.imagesetpixel-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3276">
<p><strong>Example #1 <span class="function"><strong>imagesetpixel()</strong></span> example</strong></p>
<div class="example-contents"><p>
A random drawing that ends with a regular picture.
</p></div>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /><br />$x </span><span style="color: #007700">= </span><span style="color: #0000BB">200</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$y </span><span style="color: #007700">= </span><span style="color: #0000BB">200</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$gd </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">$x</span><span style="color: #007700">, </span><span style="color: #0000BB">$y</span><span style="color: #007700">);<br /> <br /></span><span style="color: #0000BB">$corners</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">] = array(</span><span style="color: #DD0000">'x' </span><span style="color: #007700">=> </span><span style="color: #0000BB">100</span><span style="color: #007700">, </span><span style="color: #DD0000">'y' </span><span style="color: #007700">=> </span><span style="color: #0000BB">10</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$corners</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">] = array(</span><span style="color: #DD0000">'x' </span><span style="color: #007700">=> </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #DD0000">'y' </span><span style="color: #007700">=> </span><span style="color: #0000BB">190</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$corners</span><span style="color: #007700">[</span><span style="color: #0000BB">2</span><span style="color: #007700">] = array(</span><span style="color: #DD0000">'x' </span><span style="color: #007700">=> </span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #DD0000">'y' </span><span style="color: #007700">=> </span><span style="color: #0000BB">190</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$red </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecolorallocate</span><span style="color: #007700">(</span><span style="color: #0000BB">$gd</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 /><br />for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">100000</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++) {<br /> </span><span style="color: #0000BB">imagesetpixel</span><span style="color: #007700">(</span><span style="color: #0000BB">$gd</span><span style="color: #007700">, </span><span style="color: #0000BB">round</span><span style="color: #007700">(</span><span style="color: #0000BB">$x</span><span style="color: #007700">),</span><span style="color: #0000BB">round</span><span style="color: #007700">(</span><span style="color: #0000BB">$y</span><span style="color: #007700">), </span><span style="color: #0000BB">$red</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$a </span><span style="color: #007700">= </span><span style="color: #0000BB">rand</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$x </span><span style="color: #007700">= (</span><span style="color: #0000BB">$x </span><span style="color: #007700">+ </span><span style="color: #0000BB">$corners</span><span style="color: #007700">[</span><span style="color: #0000BB">$a</span><span style="color: #007700">][</span><span style="color: #DD0000">'x'</span><span style="color: #007700">]) / </span><span style="color: #0000BB">2</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">$y </span><span style="color: #007700">= (</span><span style="color: #0000BB">$y </span><span style="color: #007700">+ </span><span style="color: #0000BB">$corners</span><span style="color: #007700">[</span><span style="color: #0000BB">$a</span><span style="color: #007700">][</span><span style="color: #DD0000">'y'</span><span style="color: #007700">]) / </span><span style="color: #0000BB">2</span><span style="color: #007700">;<br />}<br /> <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">$gd</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-imagesetpixel.png" alt="Output of example : imagesetpixel()" width="200" height="200" />
</div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.imagesetpixel-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.imagecreatetruecolor.html" class="function" rel="rdfs-seeAlso">imagecreatetruecolor()</a> - Create a new true color image</span></li>
<li class="member"> <span class="function"><a href="function.imagecolorallocate.html" class="function" rel="rdfs-seeAlso">imagecolorallocate()</a> - Allocate a color for an image</span></li>
<li class="member"> <span class="function"><a href="function.imagecolorat.html" class="function" rel="rdfs-seeAlso">imagecolorat()</a> - Get the index of the color of a pixel</span></li>
</ul>
</p>
</div>
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