一直想把网站主题搞成跟背景一个色调,所以就用到了PHP取色 .

原理也很简单利用For循环取整张图片的颜色RGB平均值,网上都有现成的 .

我只是整理出来, 有需要的童鞋可以来看看 .

我就直接贴我的代码了 .

<?php
function getRgbimg($dec)
{
return strtoupper($dec>15?dechex($dec):('0'.dechex($dec)));
}
$im = imagecreatefromjpeg('http://image9.360doc.com/DownloadImg/2010/05/0911/3143484_2.jpg');
for ($x=0;$x<imagesx($im);$x++) {
for ($y=0;$y<imagesy($im);$y++) {
$rgb = imagecolorat($im,$x,$y);

$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;

@$rTotal += $r;
@$gTotal += $g;
@$bTotal += $b;
@$total++;
}
}
$rAverage = round($rTotal/$total);
$gAverage = round($gTotal/$total);
$bAverage = round($bTotal/$total);
$RGB = getRgbimg($rAverage).getRgbimg($gAverage).getRgbimg($bAverage);
echo "dec:$rAverage-$gAverage-$bAverage<br />hex:#$RGB";
echo '<div style="background-color:'.$RGB.'; width:80px; height:80px"></div>';
?>