在 PHP 中将 RGB 转换为十六进制颜色值
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Convert RGB to hex color values in PHP
提问by ravichandra
in my code i have
在我的代码中我有
$color = rgb(255, 255, 255);
i want to convert this into hex color code.Out put like
我想把它转换成十六进制颜色代码。输出就像
$color = '#ffffff';
回答by user3942918
A simple sprintfwill do.
一个简单的sprintf就行了。
$color = sprintf("#%02x%02x%02x", 13, 0, 255); // #0d00ff
To break down the format:
分解格式：
#- the literal character #%- start of conversion specification0- character to be used for padding2- minimum number of characters the conversion should result in, padded with the above as necessaryx- the argument is treated as an integer and presented as a hexadecimal number with lowercase letters%02x%02x- the above four repeated twice more
#- 文字字符#%- 转换规范的开始0- 用于填充的字符2- 转换应产生的最少字符数，必要时用上述内容填充x- 参数被视为整数，并表示为带有小写字母的十六进制数%02x%02x- 以上四个重复了两次
回答by IAmMilinPatel
You can try this simple piece of code below. You can pass the rgb code dynamically as well in the code.
你可以试试下面这段简单的代码。您也可以在代码中动态传递 rgb 代码。
$rgb = (123,222,132);
$rgbarr = explode(",",$rgb,3);
echo sprintf("#%02x%02x%02x", $rgbarr[0], $rgbarr[1], $rgbarr[2]);
This will code return like #7bde84
这将代码返回如#7bde84
回答by Suyog
You can use following function
您可以使用以下功能
function fromRGB($R, $G, $B)
{
$R = dechex($R);
if (strlen($R)<2)
$R = '0'.$R;
$G = dechex($G);
if (strlen($G)<2)
$G = '0'.$G;
$B = dechex($B);
if (strlen($B)<2)
$B = '0'.$B;
return '#' . $R . $G . $B;
}
Then, echo fromRGB(115,25,190);will print #7319be
然后，echo fromRGB(115,25,190);将打印#7319be
回答by Mat Lipe
Here is a function that will accept the string version of either an rgbor rgbaand return the hexcolor.
这里是一个将接受一个字符串版本的函数rgb或rgba并返回hex颜色。
function rgb_to_hex( string $rgba ) : string {
if ( strpos( $rgba, '#' ) === 0 ) {
return $rgba;
}
preg_match( '/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?/i', $rgba, $by_color );
return sprintf( '#%02x%02x%02x', $by_color[1], $by_color[2], $by_color[3] );
}
Example:
rgb_to_hex( 'rgba(203, 86, 153, 0.8)' );// Returns #cb5699
示例：
rgb_to_hex( 'rgba(203, 86, 153, 0.8)' );// 返回#cb5699
回答by Rajarshi Das
You can try this
你可以试试这个
function rgb2html($r, $g=-1, $b=-1)
{
if (is_array($r) && sizeof($r) == 3)
list($r, $g, $b) = $r;
$r = intval($r); $g = intval($g);
$b = intval($b);
$r = dechex($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;
}
