PHP code to print the factorial of a number

Below is the php code to print the factorial of a number.

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

$save_factorial=array(); function factorial($n) {     global $save_factorial;     if($n==1||$n==0)         return 1;     if(isset($save_factorial[$n]))         return $save_factorial[$n];     $save_factorial[$n]=bcmul($n,factorial($n-1));         return $save_factorial[$n]; }   $t=trim(fgets(STDIN)); for($k=1;$k<=$t;$k++) {     $i=trim(fgets(STDIN));     echo factorial($i)."\n"; }