When I do a print_r of an array, I get this.
Array
(
[0] => Array
(
[0] => 9
)
[2] => Array
(
[0] => 1
[1] => 3
)
[3] => Array
(
[0] => 2
[1] => 6
[2] => 8
)
[4] => Array
(
[0] => 4
[1] => 5
)
[7] => Array
(
[0] => 7
)
)
meaning that elements 1,5,7,8,9,10,11,12 are empty. Is there anyway I can 'see' or know they are empty? Because I am store all these elements where the uppermost elements (0 upto 12) refer to groups and now have to print out the members of each group ( or 0 members as the case may be). Is there anyway to see which arrays are empty?