you can not use Global to make a variable in to an array if that variable was already defined.

code:

---

$temp = 0
? "vartype = " vartype($temp)
;the next line will fail
global $temp[10]
? "vartype = " vartype($temp)

---

but you do not have this problem with DIM

code:

---

$temp = 0
? "vartype = " vartype($temp)
;$temp is redefined as an array
dim $temp[10]
? "vartype = " vartype($temp)

---

The reason I want to use Global Vs Dim is that this variable must exist outside the confines of the UDF it was created in.