<?php$i=imagecreatefromjpeg("photo3.jpg");//测试图片，自己定义一个，注意路径for ($x=0;$x<imagesx($i);$x++) {    for ($y=0;$y<imagesy($i);$y++) {        $rgb = imagecolorat($i,$x,$y);        $r=($rgb >>16) & 0xFF;        $g=($rgb >> & 0xFF;        $b=$rgb & 0xFF;        $rTotal += $r;        $gTotal += $g;        $bTotal += $b;        $total++;    }}$rAverage = round($rTotal/$total);$gAverage = round($gTotal/$total);$bAverage = round($bTotal/$total);//示例：echo $rAverage;?>