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<title>Finds whether an image is a truecolor image</title>
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<h1 class="refname">imageistruecolor</h1>
<p class="verinfo">(PHP 4 >= 4.3.2, PHP 5)</p><p class="refpurpose"><span class="refname">imageistruecolor</span> — <span class="dc-title">Finds whether an image is a truecolor image</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.imageistruecolor-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>imageistruecolor</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>imageistruecolor()</strong></span> finds whether the image
<em><code class="parameter">image</code></em> is a truecolor image.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.imageistruecolor-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>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.imageistruecolor-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if the <em><code class="parameter">image</code></em> is truecolor, <strong><code>FALSE</code></strong>
otherwise.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.imageistruecolor-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3254">
<p><strong>Example #1 Simple detection of true color image instances using <span class="function"><strong>imageistruecolor()</strong></span></strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// $im is an image instance<br /><br />// Check if image is a true color image or not<br /></span><span style="color: #007700">if(!</span><span style="color: #0000BB">imageistruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">))<br />{<br /> </span><span style="color: #FF8000">// Create a new true color image instance<br /> </span><span style="color: #0000BB">$tc </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatetruecolor</span><span style="color: #007700">(</span><span style="color: #0000BB">imagesx</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">), </span><span style="color: #0000BB">imagesy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">));<br /><br /> </span><span style="color: #FF8000">// Copy over the pixels<br /> </span><span style="color: #0000BB">imagecopy</span><span style="color: #007700">(</span><span style="color: #0000BB">$tc</span><span style="color: #007700">, </span><span style="color: #0000BB">$im</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">imagesx</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">), </span><span style="color: #0000BB">imagesy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">));<br /> </span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">$im </span><span style="color: #007700">= </span><span style="color: #0000BB">$tc</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">$tc </span><span style="color: #007700">= </span><span style="color: #0000BB">NULL</span><span style="color: #007700">;<br /><br /> </span><span style="color: #FF8000">// OR use imagepalettetotruecolor()<br /></span><span style="color: #007700">}<br /><br /></span><span style="color: #FF8000">// Continue working with image instance<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.imageistruecolor-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">This function requires GD 2.0.1 or later (2.0.28 or later is recommended).</span></p></blockquote>
</div>
<div class="refsect1 seealso" id="refsect1-function.imageistruecolor-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.imagepalettetotruecolor.html" class="function" rel="rdfs-seeAlso">imagepalettetotruecolor()</a> - Converts a palette based image to true color</span></li>
</ul>
</p>
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