How to use processlegendtemplate function ?

[Carlos Eduardo Sibaja Salazar]

Hi list.
I need to generate a html legend in my application. I'm using php-
mapscript. I have been reading about it and is supposed that I must use
the processlegendtemplate function, but I haven't found an example of how
to use it. I don't know what parameters i have to send in the function.
Please somebody tell me which are the steps that i have to follow to make
a html legend.
Thanks for your help.!!