Variable Syntax Help Needed PLEASE!!

Hello everybody, I have a hopefully simple question. Assume I have an array like so: $i1[0] = "blah"; $i1[1] = "barf"; $i2[0] = "hello"; $i2[1] = "there"; $i3[0] = "good"; $i3[1] = "afternoon"; ..... $x is the number of arrays above, or in this case 3. I also have a for loop like: for ($a = "1"; $a <= $x; $a++) { .... } How would I refer to $i1[0] and $i1[1] and $i2[0] and $i2[1] and $i3[0] and $i3[1] in my for loop? Thanks in advance :-D Jeff