validateing form arrays

i am having some trouble here

i have a form that produces an array in a $_GET url

color[]=yadda&color[]=jikes

neither isset nor emply seems to correctly check for the variable

if i enter a blank into the url

color[]=

then it returns TRUE everytime

 

you may try direct way

if ($color=='') { bla bla } 

if ($color[0]=='' || $color[1]=='') { bla bla } 

Code (markup):

 

thanks ill give it a go