php函数十六进制或RGB颜色到颜色的名称 [英] Php function hex or rgb color to color name

问题描述

是否有一个php函数通过将rgb或hex颜色作为参数来返回最接近的colorname?我已经苦了很多，但是找不到能完成这项工作的功能.

Is there a php function that return the closest colorname by give the rgb or hex color as parameter? I have seared a lot but can't find a function that does that job.

请帮助

推荐答案

请参阅下面的我的代码".我使用它来复制徽标颜色，以在运行时自动更改网站主题.希望它能起作用！

See my Code below. I use it to copy Logo Color to change the site theme automatically at run-time. Hope it works!

只需将图像URL作为参数传递给函数.

Simply pass the image URL as parameter in the function.

function CopyLogoColor($logo_path){
    $i = imagecreatefromjpeg($logo_path);

    $rTotal = 0;
    $gTotal =0;
    $bTotal = 0;
    $total = 0;

    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 >> 8)& 0xFF;
            $b   = $rgb & 0xFF;

            $rTotal += $r;
            $gTotal += $g;
            $bTotal += $b;
            $total++;

        }
    }

    $rAverage = round($rTotal/$total);
    $gAverage = round($gTotal/$total);
    $bAverage = round($bTotal/$total);



    $r = intval($rAverage); 
    $g = intval($gAverage);
    $b = intval($bAverage);

    $r = dechex($r<0?0:($r>255?255:$r));
    $g = dechex($g<0?0:($g>255?255:$g));
    $b = dechex($b<0?0:($b>255?255:$b));

    $color = (strlen($r) < 2?'0':'').$r;
    $color .= (strlen($g) < 2?'0':'').$g;
    $color .= (strlen($b) < 2?'0':'').$b;

    return '#'.$color;

}

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