<br/>
<form action="action_test.php" method="post">
    First Name  <input type="textbox" name="fname"><br/>
    Last Name   <input type="textbox" name="lname"><br/>
    age         <input type="textbox" name=  "age"><br/>
    Username    <input type="textbox" name=  "user"><br/>
    Password    <input type="password" name=  "pass"><br/>
    <input type="submit" value="submit">
</form>
<?php
$user=$_POST['user'];
$pass=$_POST['pass'];
$fname=$_POST['fname'];
$lname=$_POST['lname'];
$age=$_POST['age'];
$con = mysql_connect("localhost",$user,$pass);
if (!$con){
    die("Wrong Password");
  }

mysql_select_db("my_db", $con);
mysql_query("INSERT INTO Persons (FirstName, LastName, Age)
    VALUES ($fname, $lname, $age)
    "
);

$result = mysql_query("SELECT * FROM Persons");

echo "<table border='1'>
<tr>
<th>Firstname</th>
<th>Lastname</th>
<th>Age</th>
</tr>";

while($row = mysql_fetch_array($result))
  {
  echo "<tr>";
  echo "<td>" . $row['FirstName'] . "</td>";
  echo "<td>" . $row['LastName'] . "</td>";
  echo "<td>" . $row['Age'] . "</td>";
  echo "</tr>";
  }
echo "</table>";
?>