Question

我的网站上有两个日期选择，管理员可以选择"start date"和"end date"。从开始到结束的所有日期将被上传到数据库。例如：

Start Date: 2015-01-01
End Date: 2015-01-05

Upload to database:
2015-01-01
2015-01-02
2015-01-03
2015-01-04
2015-01-05

我已经有一个代码来执行此操作，尽管它只将一个日期上传到数据库，即开始日期。有什么想法，我将如何工作上传所选的开始和结束日期之间的所有日期？这是我目前的代码：

if(isset($_POST['add'])){

$servername = "localhost";
$username = "u779108225_admin";
$password = "password";
$dbname = "u779108225_main";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

$date_from = $_POST['date_from']; 
$date_from = strtotime($date_from); // Convert date to a UNIX timestamp

// Specify the end date. This date can be any English textual format
$date_to = $_POST['date_to'];
$date_to = strtotime($date_to); // Convert date to a UNIX timestamp

// Loop from the start date to end date and output all dates inbetween
for ($i=$date_from; $i<=$date_to; $i+=86400) {
    $date = date("Y-m-d", $i);
    $sql = "INSERT INTO calendar (date)
VALUES
('$date')";

}


if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
// Specify the start date. This date can be any English textual format



}

Answer 1

在每次循环迭代中覆盖$sql时，您只执行上一次查询。将执行语句移动到循环中：

for ($i=$date_from; $i<=$date_to; $i+=86400) {
    $date = date("Y-m-d", $i);
    $sql = "INSERT INTO calendar (date) VALUES ('$date')";
     if ($conn->query($sql) === TRUE) {
        echo "New record created successfully";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }
}

或进行一次查询并执行：

$sql = "INSERT INTO calendar (date) VALUES ";
$values = array();
for ($i=$date_from; $i<=$date_to; $i+=86400) {
    $date = date("Y-m-d", $i);
    $values[] = "('$date')";

}
$sql .= implode(',', $values);
if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

Answer 2

我更喜欢在时间戳等上使用DateTime对象。

你的for循环是多次设置查询，但是你只执行了一次查询。

这是使用DateTime的固定版本。

if(isset($_POST['add'])){

    $servername = "localhost";
    $username = "u779108225_admin";
    $password = "password";
    $dbname = "u779108225_main";

    // Create connection
    $conn = new mysqli($servername, $username, $password, $dbname);
    // Check connection
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    } 

    $date_from = $_POST['date_from']; 
    $date_from = new DateTime($date_from);

    $date_to = $_POST['date_to'];
    $date_to = new DateTime($date_to);

    $cur_date = $date_from;
    while($cur_date < $date_to) {
        $date = $cur_date->format('Y-m-d');
        $sql = "
            INSERT INTO calendar (date)
            VALUES
            ('$date');
        ";
        $cur_date->modify('+1 day');

        if ($conn->query($sql) === TRUE) {
            echo "Date inserted: {$date}";
        } else {
            echo "Error: " . $sql . "<br>" . $conn->error;
        }
    }

    $conn->close();

}

将日期列表添加到数据库

2 个答案: