if ($_POST['count'] != ""){
if (is_numeric($_POST['count'])){
$time_start = microtime(1);
$x = $_POST['count'];
for($i=1;$i<=$x;$i++) {
$f=sqrt($i);
for($z=1;$z<=$f;$z++) {
$y=$i%$z;
if($y==0){
$l++;
}
if($l>=2){
break;
}
}
if ($l<=1){
echo "$i, ";
$b++;
}
$l=0;
}
$time_end = microtime(1);
$time = $time_end - $time_start;
echo "
[ Found first $x prime numbers in $time seconds ]";
}
else
{
echo "
Please enter a number!";
}
}
?>