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我设计了以下代码；计算患者的等待时间和预期时间。如果患者等待的时间过长，该代码还应回显警告。

请注意：Waiting_time 是数据库中的 DATETIME。

这是代码；

<?php

$conn = mysqli_connect("localhost","root","") or die ("No connection");
mysqli_select_db($conn, "a&e") or die('Could not select database.');

$query = "SELECT PatientID, Forename, Surname, Gender, Illness, Priority, Arrival_time,NOW() as now,ABS(TIMEDIFF(NOW(), Arrival_time)) as Waiting_Time FROM Patient";
$result = mysqli_query($conn, $query) or die("Invalid query"); 

echo "<table border='1'>
<tr>
<th>PatientID</th>
<th>Forename</th>
<th>Surname</th>
<th>Gender</th>
<th>Illness</th>
<th>Priority</th>
<th>Waiting Time</th>
</tr>";

while ($row = $result->fetch_object()){

//Select the  expected and discharge time for this patient.
  $query2 = "SELECT Abs(TIMEDIFF(Expected_Time,'00:00:00')) as Expected,Abs(TIMEDIFF(Discharge_Time,'00:00:00')) as Discharge ".
                "FROM priority_time ".
                "WHERE Illness = '".$row->Illness."'".
                    " AND Priority = '".$row->Priority."'".
                ";";

    $result2 = mysqli_query($conn, $query2) or die("Invalid statement: ".$query2);

    $row2 = $result2->fetch_object();
    $expected =  $row2->Expected;

    $discharge  = $row2->Discharge;
    echo "expected-> ".$expected." discharge-> ".$discharge;

    if($expected > $discharge){
        echo "There is a problem with the database consistency, expectedTime must be less than dischargeTime!";
    }
    //Set the patient color.
    if($row->Waiting_Time <  $expected && $row->Waiting_Time <  $discharge){
        echo "<tr>";
    }
    if($row->Waiting_Time >=  $expected && $row->Waiting_Time <  $discharge){
        echo '<tr bgcolor="#FFFF00">';
    }
    if($row->Waiting_Time >  $expected && $row->Waiting_Time >  $discharge){
        echo '<tr bgcolor="#FF0000">';
    }

    //Print patient info
     echo 
      "<td>" . $row->PatientID . "</td>
      <td>" . $row->Forename . "</td>
      <td>" . $row->Surname . "</td>
      <td>" . $row->Gender . "</td>
      <td>" . $row->Illness . "</td>
      <td>" . $row->Priority . "</td>
      <td>" . $row->Waiting_Time . "(".$expected."-".$discharge.") </td>";

    //Close row
    echo "</tr>";

}

echo "</table>";
mysqli_close($conn);
?>

编辑：在每一行，在等待时间列中，它以秒为单位显示等待时间，括号中是 currentTime a 减号和到达时间，仅用于检查。如何将等待时间转换为 hh:mm:ss 格式以便更好地代表用户？

显示； 

Waiting time 
01:15:42(10500.000000-10500.000000)

为什么显示（10500.000000-10500.000000）？

4

2 回答 2

0

尝试这个：

gmdate("H:i:s", $seconds)

如果这不起作用，请查看如何将秒转换为时间格式？

更新：

要在 SQL 语句中执行此操作，请尝试以下操作：

SELECT TIME_TO_SEC(TIMEDIFF('2013-03-27 12:00:00', '2013-03-27 10:00:00')) diff;

所以是这样的：

SELECT PatientID
, Forename
, Surname
, Gender
, Illness
, Priority
, Arrival_time
, NOW() as now
, TIME_TO_SEC(TIMEDIFF(NOW(), Arrival_time)) as Waiting_Time 
FROM Patient;

然后你会改变这一行：

<td>" . $row->Waiting_Time . "(".$expected."-".$discharge.") </td>

对此：

<td>" . gmdate("H:i:s", $row->Waiting_Time) . "(".$expected."-".$discharge.") </td>
于 2013-03-27T12:23:22.957 回答
0

在 php 中处理日期和时间时，strtotime() 是你最大的朋友。幸运的是 date() 函数就是你所需要的。将秒转换为可读格式的东西可能如下。

$time = strtotime('now');
echo $time . '<br />';
$var =  date('H:i:s',$time);
echo $var;
于 2013-03-27T12:29:36.420 回答