Hi how PHP rounds the numbers in this case ? $a = array( 0.5 => 1, 0.8 => 2, 1.2 => 3, 1.8 => 4, ); print_r($a); echo round(0.5); we cannot have float keys so they will be rounded but I am wondering for example rounding 0.5 will return 1 so from 0.1 to 0.4 all will be rounded to 0 so it seems it is not doing the logic like the round function because the $a output is : Array ( [0] => 2 [1] => 4 ) what is the logic here? Sincerely Negin Nickparsa
