even and odd numbers while loop in php

<?php
 error_reporting(0);
?>

If any number is divisible by 2 then number is even
Ex:  10%2= 0,  10 is even number(“ % “ denote the remainder  and  ” / ” denote quotient)

<form action="" method="post">
<input type="text" name="num">
<input type="submit" name="sub" value="Submit">
</form>

<hr>


Even Number List:


<?php
if($_POST['sub']=="Submit")
{
$num=$_POST['num'];

for($i=2; $i<$num; $i++)
{
if($i%2==0)
{
echo "$i"."&nbsp;";
}
}
}
?>
Output: