imagecolordeallocate

(PHP 4, PHP 5, PHP 7)

imagecolordeallocate取消图像颜色的分配

说明

bool imagecolordeallocate ( resource $image , int $color )

imagecolordeallocate() 函数取消先前由 imagecolorallocate()imagecolorallocatealpha() 分配的颜色。

<?php
$white 
imagecolorallocate($im255255255);
imagecolordeallocate($im$white);
?>

参见 imagecolorallocate()imagecolorallocatealpha()

User Contributed Notes

sabretur 17-Oct-2013 04:38
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;
}