<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Get the index of the specified color or its closest possible alternative</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagecolormatch.html">imagecolormatch</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagecolorresolvealpha.html">imagecolorresolvealpha</a></div> <div class="up"><a href="ref.image.html">GD and Image Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.imagecolorresolve" class="refentry"> <div class="refnamediv"> <h1 class="refname">imagecolorresolve</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">imagecolorresolve</span> — <span class="dc-title">Get the index of the specified color or its closest possible alternative</span></p> </div> <div class="refsect1 description" id="refsect1-function.imagecolorresolve-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><strong>imagecolorresolve</strong></span> ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$image</code></span> , <span class="methodparam"><span class="type">int</span> <code class="parameter">$red</code></span> , <span class="methodparam"><span class="type">int</span> <code class="parameter">$green</code></span> , <span class="methodparam"><span class="type">int</span> <code class="parameter">$blue</code></span> )</div> <p class="para rdfs-comment"> This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative. </p> <p class="para">If you created the image from a file, only colors used in the image are resolved. Colors present only in the palette are not resolved.</p> </div> <div class="refsect1 parameters" id="refsect1-function.imagecolorresolve-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">red</code></em></span> <dd> <p class="para">Value of red component.</p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">green</code></em></span> <dd> <p class="para">Value of green component.</p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">blue</code></em></span> <dd> <p class="para">Value of blue component.</p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.imagecolorresolve-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a color index. </p> </div> <div class="refsect1 examples" id="refsect1-function.imagecolorresolve-examples"> <h3 class="title">Examples</h3> <div class="example" id="example-3194"> <p><strong>Example #1 Using <span class="function"><strong>imagecoloresolve()</strong></span> to get colors from an image</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">// Load an image<br /></span><span style="color: #0000BB">$im </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatefromgif</span><span style="color: #007700">(</span><span style="color: #DD0000">'phplogo.gif'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Get closest colors from the image<br /></span><span style="color: #0000BB">$colors </span><span style="color: #007700">= array();<br /></span><span style="color: #0000BB">$colors</span><span style="color: #007700">[] = </span><span style="color: #0000BB">imagecolorresolve</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</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">$colors</span><span style="color: #007700">[] = </span><span style="color: #0000BB">imagecolorresolve</span><span style="color: #007700">(</span><span style="color: #0000BB">$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">200</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Output<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$colors</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<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="example-contents screen"> <div class="cdata"><pre> Array ( [0] => 89 [1] => 85 ) </pre></div> </div> </div> </div> <div class="refsect1 seealso" id="refsect1-function.imagecolorresolve-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.imagecolorclosest.html" class="function" rel="rdfs-seeAlso">imagecolorclosest()</a> - Get the index of the closest color to the specified color</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagecolormatch.html">imagecolormatch</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagecolorresolvealpha.html">imagecolorresolvealpha</a></div> <div class="up"><a href="ref.image.html">GD and Image Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>