php如何產生循環顏色的交替變化

js 就可以了!

function getColor()

{

var str;

while (1)

{

var r = Math.floor(Math.random() * 240).toString(16);

var g = Math.floor(Math.random() * 240).toString(16);

var b = Math.floor(Math.random() * 240).toString(16);

r = r.length == 1 ? "0" + r : r;

g = g.length == 1 ? "0" + g : g;

b = b.length == 1 ? "0" + b : b;

str="#" + r + g + b;

if (str!="#ffffff")

return str;

}