Добавление и удаление данных

<?php
    @mysql_connect("localhost:3306", "root", "");
    mysql_select_db("db1");
    mysql_query("SET NAMES utf8");
    
    if (isset($_POST['lastname'])) {
        $lastname = $_POST['lastname'];
        $firstname = $_POST['firstname'];
        $patronymic = $_POST['patronymic'];
        $age = $_POST['age'];
        $school = $_POST['school'];
        $phone = $_POST['phone'];
        $institut = $_POST['institut'];
        $matan = $_POST['matan'];
        $russian = $_POST['russian'];
        $programm = $_POST['programm'];
        $filosofiya = $_POST['filosofiya'];
        $result = mysql_query("INSERT INTO people (lastname, firstname, patronymic, age, school, phone, institut) VALUES ('{$lastname}', '{$firstname}', '{$patronymic}', {$age}, {$school}, '{$phone}', '{$institut}');");
        $result1 = mysql_query("INSERT INTO asset (matan, russian, programm, filosofiya) VALUES ('{$matan}', '{$russian}', '{$programm}', {$filosofiya}');");
        header('Location: index.php');
        exit;
    }
?>

$result = mysql_query("INSERT INTO people (lastname, firstname, patronymic, age, school, phone, institut) VALUES ('{$lastname}', '{$firstname}', '{$patronymic}', {$age}, {$school}, '{$phone}', '{$institut}');") or die(mysql_error());
        $result1 = mysql_query("INSERT INTO asset (matan, russian, programm, filosofiya) VALUES ('{$matan}', '{$russian}', '{$programm}', {$filosofiya}');") or die(mysql_error());
        header('Location: index.php');
        exit;
    }
?>