Untitled

<?php
$con=mysqli_connect("localhost","nextseal_new","plokij0987","nextseal_new");
if (mysqli_connect_errno()){
echo "connecting failed".mysql_connect_error();
}
?>
<html>
<body><center>
<form method="post">
<input type="submit" name="show" value="show members">
</form>
<form method="post">
Type only first name:<input type="text" name="del">
<input type="submit" name="delete" value="delete members">
</form>
<form method="post">
<input type="text" name="namemain"><br>
<input type="text" name="fname"><br>
<input type="text" name="lname"><br>
<input type="text" name="addr"><br>
<input type="text" name="phone"><br>
<input type="submit" name="editm" value="add memeber">
</form>
<?

if (isset($_POST['editm']))
{
$sql="INSERT INTO persons(name, Firstname, Lastname, address, phone) VALUES('$_POST[namemain]','$_POST[fname]','$_POST[lname]','$_POST[addr]','$_POST[phone]')";
if (mysqli_query($con,$sql))
{
echo "Values Addess Successfully !";
}
else {
echo "Value Couldn't add".mysql_error();
}
mysqli_close($con);
}

?>
<?php
if (isset($_POST['show']))
{
$show="SELECT *FROM persons";
$result=mysqli_query($con,$show);
echo "<table border=1>";
echo "<tr>";
echo "<td>name</td><td>Firstname</td><td>Lastname</td><td>address</td><td>phone</td>";
echo "</tr>";
while ($row=mysqli_fetch_array($result))
{
echo "<tr>";
echo "<td>".$row[0]."</td>";
echo "<td>".$row[1]."</td>";
echo "<td>".$row[2]."</td>";
echo "<td>".$row[3]."</td>";
echo "<td>".$row[4]."</td>";
echo "</tr>";
}
echo "</table>";
mysqli_close($con);
}
?>
<?php
if (isset($_POST['del']))
{
$loilam=$_POST['del'];
$del="DELETE FROM persons WHERE Firstname='$_POST[del]'";
mysqli_query($con,$del);
echo "member delete !";
}
?>
</cente
</body>
</html>