使用 PHP 把 16 进制的颜色代码转换成 RGB 数组
在 PHP 中,如果获取的颜色代码是 16 进制的格式,怎么转成 RGB 数组格式呢?
function wpjam_hex2rgb($hex) {
$hex = str_replace("#", "", $hex);
if(strlen($hex) == 3) {
$r = hexdec(substr($hex,0,1).substr($hex,0,1));
$g = hexdec(substr($hex,1,1).substr($hex,1,1));
$b = hexdec(substr($hex,2,1).substr($hex,2,1));
} else {
$r = hexdec(substr($hex,0,2));
$g = hexdec(substr($hex,2,2));
$b = hexdec(substr($hex,4,2));
}
return array($r, $g, $b);
}
同样也可以将 RBG 数组格式转成 16 进制格式。
function wpjam_rgb2hex($rgb) {
$hex = "#";
$hex .= str_pad(dechex($rgb[0]), 2, "0", STR_PAD_LEFT);
$hex .= str_pad(dechex($rgb[1]), 2, "0", STR_PAD_LEFT);
$hex .= str_pad(dechex($rgb[2]), 2, "0", STR_PAD_LEFT);
return $hex;
}