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新增颜色值转换方法

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gongfuxiang 2019-06-08 18:41:16 +08:00
parent 19e136b584
commit 7d3439ad76
1 changed files with 66 additions and 0 deletions
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66
application/common.php
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@ -11,6 +11,72 @@
// 应用公共文件
/**
* RGB 转 十六进制
* @author Devil
* @blog http://gong.gg/
* @version 1.0.0
* @datetime 2019-06-08T18:38:16+0800
* @param [string] $rgb [reg颜色值]
*/
function RgbToHex($rgb)
{
$regexp = "/^rgb\(([0-9]{0,3})\,\s*([0-9]{0,3})\,\s*([0-9]{0,3})\)/";
preg_match($regexp, $rgb, $match);
$re = array_shift($match);
$hex_color = "#";
$hex = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F');
for ($i = 0; $i < 3; $i++)
{
$r = null;
$c = $match[$i];
$hex_array = [];
while ($c > 16)
{
$r = $c % 16;
$c = ($c / 16) >> 0;
array_push($hex_array, $hex[$r]);
}
array_push($hex_array, $hex[$c]);
$ret = array_reverse($hex_array);
$item = implode('', $ret);
$item = str_pad($item, 2, '0', STR_PAD_LEFT);
$hex_color .= $item;
}
return $hex_color;
}
/**
* 十六进制 转 RGB
* @author Devil
* @blog http://gong.gg/
* @version 1.0.0
* @datetime 2019-06-08T18:33:45+0800
* @param [string] $hex_color [十六进制颜色值]
*/
function HexToRgb($hex_color) {
$color = str_replace('#', '', $hex_color);
if(strlen($color) > 3)
{
$rgb = [
'r' => hexdec(substr($color, 0, 2)),
'g' => hexdec(substr($color, 2, 2)),
'b' => hexdec(substr($color, 4, 2))
];
} else {
$color = $hex_color;
$r = substr($color, 0, 1) . substr($color, 0, 1);
$g = substr($color, 1, 1) . substr($color, 1, 1);
$b = substr($color, 2, 1) . substr($color, 2, 1);
$rgb = [
'r' => hexdec($r),
'g' => hexdec($g),
'b' => hexdec($b)
];
}
return $rgb;
}
/**
* 字符串转ascii
* @author Devil