Code: <form action="" method="post"> Select your choice: <select name="choice"> <option value="">Select</option> <option value="1">Accending Order</option> <option value="2">Descending</option> </select> <br /> <input type="submit" value="Submit" name="submit" /> </form> <?php if(isset($_POST['submit'])){ $choice = $_POST['choice']; $array = array(21,5,2,9,22,18); if($choice ==1 ){ sort($array); print "Sorted In Accending Order:<br />"; for($i=0;$i<count($array);$i++){ print $array[$i]."<br />"; } } else if($choice == 2){ rsort($array); print "Sorted In Decending Order:<br />"; for($i=0;$i<count($array);$i++){ print $array[$i]."<br />"; } } else { ...