php - 如何使用php从数据库中提取日期

Question

我正在尝试制定每周工作计划。当我尝试从数据库中选择类次时，我的日期值选择当前时间，但从表中选择日期(年月日)。

这是我的代码:

while ($row = mysqli_fetch_array($res))
{
          $dt = new DateTime();
          $dt->setISODate($year, $week);

          $fetch_mID = $row['ID_EMPLOYEE'];
          $fetch_fn = $row['Firstname'];
          $fetch_en = $row['Lastname'];
          echo "<tr>";
            echo "<td>" . $fetch_fn . " " . $fetch_en . "</td>";

            do {
              $obj = new ReflectionObject($dt);
              $pro = $obj->getProperty('date');
              $date = $pro->getValue($dt);
              echo $date; //Output = 'Y-m-d H:m:s'

              $shift = $conn->query("SELECT ShiftDate, ShiftStart, ShiftEnd FROM shifts WHERE ID_EMPLOYEE = '$fetch_mID' AND Date(ShiftDate) = '$date'");
              $fetch = mysqli_fetch_array($shift);
              $dt->modify('+1 day');
            } while ($week == $dt->format('W'));

我希望 $date 输出 Y-m-d，但它输出 Y-m-d H:m:s。并且时间是当前时间。

Answer 1

解决方案是将$date转换为日期对象，然后使用新格式Y-m-d格式化日期。

  $time = strtotime($date);
  $newformat = date('Y-m-d',$time);
  echo $newformat; // output 2019-04-05

你的新代码似乎是这样的:

while ($row = mysqli_fetch_array($res))
{
          $dt = new DateTime();
          $dt->setISODate($year, $week);

          $fetch_mID = $row['ID_EMPLOYEE'];
          $fetch_fn = $row['Firstname'];
          $fetch_en = $row['Lastname'];
          echo "<tr>";
            echo "<td>" . $fetch_fn . " " . $fetch_en . "</td>";

            do {
              $obj = new ReflectionObject($dt);
              $pro = $obj->getProperty('date');
              $date = $pro->getValue($dt);
              //new code
              $newformat = date('Y-m-d',strtotime($date));
              echo $newformat; // output 2019-04-05
              // end new code
              $shift = $conn->query("SELECT ShiftDate, ShiftStart, ShiftEnd FROM shifts WHERE ID_EMPLOYEE = '$fetch_mID' AND Date(ShiftDate) = '$date'");
              $fetch = mysqli_fetch_array($shift);
              $dt->modify('+1 day');
            } while ($week == $dt->format('W'));