PHP mysqli_query插入时出现语法错误

我想使用PHP将数据插入MySQL表中。

这是我的代码：

<?php
    $het = $_GET['het'];
    header('Content-Type: application/json; Charset=UTF-8');
    $connection = mysqli_connect("localhost:8889","root","root","imreigye_wp") or die("Error " . mysqli_error($connection));
    mysqli_set_charset($connection, 'utf8mb4');
    //This SQL string is really long
    $sql = "INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','" . $het . "','1','','','','','','',''); INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','" . $het . "','2','','','','','','',''); INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','" . $het . "','3','','','','','','',''); INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','" . $het . "','4','','','','','','',''); INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','" . $het . "','5','','','','','','','');";
    mysqli_query($connection, $sql) or die("ERROR: " . mysqli_error($connection));
    mysqli_close($connection);
?>

当我运行代码时，我得到一个MySQL错误：

您的SQL语法有错误；在第1行的"INSERT INTO rendelesiidok（Ev、Het、Nap、BattaR、BattaT、HacsekR然而，如果我通过phpMyAdmin运行MySQL查询，它运行起来不会有问题。这是我的MySQL日志：

160401 23:07:22    15 Connect   root@localhost on imreigye_wp
           15 Query SET NAMES utf8mb4
           15 Query INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','14','1','','','','','','',''); INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','14','2','','','','','','',''); INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','14','3','','','','','','',''); INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','14','4','','','','','','',''); INSERT INTO `rendelesiidok`(`Ev`, `Het`, `Nap`, `BattaR`, `BattaT`, `HacsekR`, `HacsekT`, `MolnarR`, `MolnarT`, `Pentek`) VALUES ('2016','14','5','','','','','','','')
           15 Quit

注意：我已经试过使用简单的引号而不是特殊的引号。那也无济于事。