问使用php-gd循环从图像中的每个像素获取imagecolorat()数据

EN

#loop to populate rgb values and save to array: $xy

    $imagew = imagesx($img);
    $imageh = imagesy($img);
    $xy = array(i);

    echo "Image (w,h): ($imagew, $imageh)<br/>";

    $x = 0;
    $y = 0;
    for ($x = 0; $x <= $imagew; $x++) {
    for ($y = 0;$y <= $imageh; $y++ ) {
            $rgb = imagecolorat($img, $x, $y);
            $r = ($rgb >> 16) & 0xFF;
            $g = ($rgb >> 8) & 0xFF;
            $b = $rgb & 0xFF;

            #loop to save ($r,$g,$b) into $xy
            for ($i = 0; $i <= $xytotal; $i++) {
            $xy[i] = ($r, $g, $b);
            }



            echo "xy: $xy x: $x, y: $y <br/>";
            var_dump($r, $g, $b);
        }
    }