Changing an images colour using PHP

[BIOSTALL]

Hi all,

I have an image containing 3 colours. Is there anyway using PHP i can change these colours, one at a time, to whatever colour is selected via a dropdown menu?

I think its a long shot but worth asking.

Many thanks, BIOSTALL

[_theworks]

You could do that... but it would be alot easier creating the image on the fly with the selected colors...

you want to look at GD[man]image[/man] functions

[BIOSTALL]

Thanks for the reply.

I've never really done much work to do with the image's side of PHP, the most being adding a watermark to an image.

I have this image here. Is there anyway i could for example change the blacks and greys on the image to green, blue and yellow??

Your help would be greatly appreciated with this.

Many thanks,

BIOSTALL

[_theworks]

Try using [man]Imagecolorat[/man] to solve your problem.

[barand]

Instead of using imagecolorat() on each individual pixel try changing the pallette for the image

$im = imagecreatefromgif('myimage.gif');
imagecolorset($im, 0, 0xFF, 0, 0);
imagecolorset($im, 1, 0, 0xFF, 0);
imagecolorset($im, 2, 0, 0, 0xFF);
imagegif($im);
imagedestroy($im);

[_theworks]

😃 im guna have to write that one down..