A faster way to get HTML color values:
function rgb2html($r, $g, $b){
$r = sprintf('%02x',$r);
$g = sprintf('%02x',$g);
$b = sprintf('%02x',$b);
return '#'.$r.$g.$b;
}
(PHP 4, PHP 5, PHP 7)
imagecolordeallocate — 取消图像颜色的分配
$image
, int $color
)imagecolordeallocate() 函数取消先前由 imagecolorallocate() 或 imagecolorallocatealpha() 分配的颜色。
<?php
$white = imagecolorallocate($im, 255, 255, 255);
imagecolordeallocate($im, $white);
?>
A faster way to get HTML color values:
function rgb2html($r, $g, $b){
$r = sprintf('%02x',$r);
$g = sprintf('%02x',$g);
$b = sprintf('%02x',$b);
return '#'.$r.$g.$b;
}