Deleting a guestbook entry

I added the record, it works, but I can’t delete it. It is necessary to make the removal method get.

I made a condition

if(isset($_GET['id']) == 'gbook' && $_GET[del] == $count) 

if the click was made on the link, then make a request to delete and delete the entry for which the parameter del is equal to the variable $ count

But for some reason is not removed

 <?php /* Основные настройки */ define('DB_HOST', 'localhost'); define('DB_LOGIN', 'root'); define('DB_PASSWORD', ''); define('DB_NAME', 'gbook'); $link = mysqli_connect(DB_HOST, DB_LOGIN, DB_PASSWORD, DB_NAME) or die('ERROR'); /* Основные настройки */ /* Сохранение записи в БД */ if($_SERVER['REQUEST_METHOD'] == 'POST'){ //проверка отправки формы echo 'Форма отправлена' . '<br>'; $name = strip_tags($_POST["name"]); $email = strip_tags($_POST["email"]); $msg = strip_tags($_POST["msg"]); echo '<br>'; //echo $name . ' ' . $email . ' ' . $msg; $res = "INSERT INTO `msgs` (name, email, msg) VALUES ('$name', '$email', '$msg')"; mysqli_query($link, $res); } /* Сохранение записи в БД */ /* Удаление записи из БД */ if(isset($_GET['id']) == 'gbook' && $_GET[del] == $count){ echo 'Удаление'; $query_del ="DELETE FROM msgs WHERE id = $count"; mysqli_query($link, $query_del); } /* Удаление записи из БД */ ?> <h3>Оставьте запись в нашей Гостевой книге</h3> <form method="post" action="<?= $_SERVER['REQUEST_URI']?>"> Имя: <br /><input type="text" name="name" /><br /> Email: <br /><input type="text" name="email" /><br /> Сообщение: <br /><textarea name="msg"></textarea><br /> <br /> <input type="submit" value="Отправить!" /> </form> <?php /* Вывод записей из БД */ $show = "SELECT id, name, email, msg, UNIX_TIMESTAMP(datetime) as dt FROM msgs ORDER BY id DESC"; $res_show = mysqli_query($link, $show); //$row = mysqli_fetch_all($res_show, MYSQLI_ASSOC); $count = 0; //всего записей while($row = mysqli_fetch_array($res_show, MYSQLI_ASSOC)){ $count++; echo 'Имя: ' . $bd_name = $row[name] . '<br>'; echo 'Email: ' . $bd_email = $row[email] . '<br>'; echo 'Сообщение: ' . $bd_msg = $row[msg] .'<br>'; echo '<a href="' . 'http://localhost/phpspec2/index.php?id=gbook&del=' .$count . '">Удалить</a>'; echo '<br>'; echo '<hr>'; } echo '<p>Всего записей в гостевой книге: ' . $count . '</p>' . '<br>'; mysqli_close($link); /* Вывод записей из БД */ ?> 

Here is an empty DB dump

 -- MySQL dump 10.13 Distrib 5.5.25, for Win32 (x86) -- -- Host: localhost Database: gbook -- ------------------------------------------------------ -- Server version 5.5.25-log /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */; /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */; /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */; /*!40101 SET NAMES utf8 */; /*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */; /*!40103 SET TIME_ZONE='+00:00' */; /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */; /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */; /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */; /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */; -- -- Table structure for table `msgs` -- DROP TABLE IF EXISTS `msgs`; /*!40101 SET @saved_cs_client = @@character_set_client */; /*!40101 SET character_set_client = utf8 */; CREATE TABLE `msgs` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(25) NOT NULL DEFAULT '', `email` varchar(50) NOT NULL DEFAULT '', `msg` text, `datetime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; /*!40101 SET character_set_client = @saved_cs_client */; -- -- Dumping data for table `msgs` -- LOCK TABLES `msgs` WRITE; /*!40000 ALTER TABLE `msgs` DISABLE KEYS */; /*!40000 ALTER TABLE `msgs` ENABLE KEYS */; UNLOCK TABLES; /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */; /*!40101 SET SQL_MODE=@OLD_SQL_MODE */; /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */; /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */; /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */; /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */; /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */; -- Dump completed on 2012-07-01 13:59:11