To reset the key values in a PHP array you can do this:
1234567891011121314151617181920212223$things = array(’a',’b',’c',’d');
unset($things[0]);
print_r($things);
#outputs
#Array
#(
# [1] => b
# [2] => c
# [3] => d
#)
# Actually do the reset.
$things = array_values($things);
print_r($things);
#outputs
#Array
#(
# [0] => b
# [1] => c
# [2] => d
#)