png color replace

how to i repplace png color using php

[nick_laws]

hi
i just want to know how can i replace the color of png file using php
for example
i have a png file and in the image there is red green and blue colors i want to replace read color to black so what will be the php code?
i dont have any idea please help me its important

[nick_laws]

no replay :S

[eeek]

Look at the imagecolorset() function of the GD package.

[nick_laws]

any more details i cant fine

[nick_laws]

***
any more details and some example of usage plz, i cant find by searching

[jatar_k]

always go to php.net

[php.net...]

try the user comments