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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 , $white );
?>
参见 imagecolorallocate() 和 imagecolorallocatealpha() 。
[#1] sabretur [2013-10-16 19:38:54]
A faster way to get HTML color values:
function rgb2html($r, $g, $b){
$r = sprintf('%02x',$r);
$g = sprintf('%02x',$g);
$b = sprintf('%02x',$b);
return '#'.$r.$g.$b;
}