尝试仅检索具有特定列php mysql的表

$servername = "数据库服务器地址";
$username = "数据库用户名";
$password = "数据库密码";
$dbname = "数据库名";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

$column_name = "要检索的列名";
$table_name = "要检索的表名";

// 构建SQL查询语句
$sql = "SELECT * FROM $table_name WHERE 1=0";
$result = $conn->query($sql);

// 获取查询结果的字段信息
$fields = $result->fetch_fields();

// 遍历字段信息，查找匹配的列
$matching_columns = array();
foreach ($fields as $field) {
    if ($field->name == $column_name) {
        $matching_columns[] = $field->name;
    }
}

// 输出匹配的列名
if (!empty($matching_columns)) {
    echo "具有特定列的表：$table_name\n";
    echo "匹配的列名：\n";
    foreach ($matching_columns as $column) {
        echo "- $column\n";
    }
} else {
    echo "没有具有特定列的表。";
}

// 关闭数据库连接
$conn->close();