php - 使用 PHP foreach 循环创建 MySQL 表 - 语法错误

Question

构建我自己的电子商务网站，并在后端创建了一个表单，管理员可以在其中创建某些产品过滤器组(例如颜色)。

当我尝试将新表插入数据库时​​，我使用 foreach 循环来确保没有插入空白条目(并防止这些空白条目导致问题)。

但是我遇到了语法问题，并且我对此进行了充分研究，但没有取得任何成功。

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'entry_date DEFAULT CURRENT_TIMESTAMP)' at line 1

我的代码:

// GROUP NAME PROVIDED

$group_name = $_POST['g_name'];

// FILTER OPTIONS PROVIDED

$filter_1 = $_POST['filter_1'];
$filter_2 = $_POST['filter_2'];
$filter_3 = $_POST['filter_3'];
$filter_4 = $_POST['filter_4'];
$filter_5 = $_POST['filter_5'];
$filter_6 = $_POST['filter_6'];
$filter_7 = $_POST['filter_7'];
$filter_8 = $_POST['filter_8'];
$filter_9 = $_POST['filter_9'];
$filter_10 = $_POST['filter_10'];
$filter_11 = $_POST['filter_11'];

include '../connection.php';

$query = "CREATE TABLE $group_name (
entry_id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
product_name VARCHAR(255) NOT NULL,
product_id VARCHAR(255) NOT NULL,";

$newarray = array($filter_1,$filter_2,$filter_3,$filter_4,$filter_5,$filter_6,$filter_7,$filter_8,$filter_9,$filter_10,$filter_11);

    // For each value that is not NULL
    foreach ($newarray as $key => $value) {
        if (is_null($value) === false) {
            $new_array[$key] = $value;
            echo $value;

           $query = "$value VARCHAR(255) NOT NULL,";

        }

    }

$query= "entry_date DEFAULT CURRENT_TIMESTAMP)";

// Checking if query was successful or not

if (mysqli_query($connection, $query )) {
    echo "Table created successfully";
} else {
    echo "Error creating table: " . mysqli_error($connection);
}

mysqli_close($connection);

我尝试了时间戳插入的不同变体，但没有成功。

值得注意的是，我还拆分了查询，以便可以包含 foreach 循环。

如有任何帮助，我们将不胜感激!

P.S 我知道这段代码对 SQL 注入(inject)是开放的，我希望在保证其安全之前让它发挥作用!

谢谢。斯坦.

工作代码:

// GROUP NAME PROVIDED

$group_name = $_POST['g_name'];

// FILTER OPTIONS PROVIDED

$filter_1 = $_POST['filter_1'];
$filter_2 = $_POST['filter_2'];
$filter_3 = $_POST['filter_3'];
$filter_4 = $_POST['filter_4'];
$filter_5 = $_POST['filter_5'];
$filter_6 = $_POST['filter_6'];
$filter_7 = $_POST['filter_7'];
$filter_8 = $_POST['filter_8'];
$filter_9 = $_POST['filter_9'];
$filter_10 = $_POST['filter_10'];
$filter_11 = $_POST['filter_11'];

include '../connection.php';

$query = "CREATE TABLE $group_name (
entry_id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
product_name VARCHAR(255) NOT NULL,
product_id VARCHAR(255) NOT NULL,";

$newarray = array($filter_1,$filter_2,$filter_3,$filter_4,$filter_5,$filter_6,$filter_7,$filter_8,$filter_9,$filter_10,$filter_11);

$filtered_array = array_filter($newarray);

    // For each value that is not NULL
    foreach ($filtered_array as $key => $value) {

            $filtered_array[$key] = $value;
            echo $value;

           $query .= "$value VARCHAR(255) NOT NULL,";       


    }

$query .= "entry_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP)";

echo "<br><br>".$query;

// Checking if query was successful or not

if (mysqli_query($connection, $query )) {
    echo "Table created successfully";
} else {
    echo "Error creating table: " . mysqli_error($connection);
}

mysqli_close($connection);

Answer 1

您缺少类型:

entry_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP

或

entry_date DATETIME DEFAULT CURRENT_TIMESTAMP