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我正在尝试使用 PHP 计算一个简单的时间函数来计算患者的等待时间。到达时间作为 TIMESTAMP 成功输入到患者表中；这是一段代码；

// validate arrival time 

$date_time=date('Y-m-d H:i:sa');

clock time
date_default_timezone_set('Europe/London');
$the_time1 = date('G:ia');

等待时间将是（时钟时间 - 到达时间）

但是，这在我的代码中不起作用！

<?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 FROM Patient";
$result = mysqli_query($conn, $query) or die("Invalid query");

date_default_timezone_set('Europe/London');
$the_time1 = date('G:ia');
$date_time=date('Y-m-d H:i:sa');

echo Waiting_time($the_time1, $date_time); 

function waiting_time ( $the_time1, $date_time) {

$time_diff =  ( $the_time1, $date_time); {
$days      = floor( $time_diff / 86400 ); // 60 * 60 * 24 = number of seconds in a day
$time_diff -= $days * 86400;
$hours      = floor( $time_diff / 3600 ); // 60 * 60 = number of seconds in a hour
$time_diff -= $hours * 3600;
$mins       = floor( $time_diff / 60 ); // 60 = number of seconds in a minute

return( $days . ' days, ' . $hours . ' hours, ' . $mins . ' minutes' );

}


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>";

}
  echo "<tr>
  <td>" . $row[0] . "</td>
  <td>" . $row[1] . "</td>
  <td>" . $row[2] . "</td>
  <td>" . $row[3] . "</td>
  <td>" . $row[4] . "</td>
  <td>" . $row[5] . "</td>
  <td>" . $waitTime . "</td>
  </tr>";
  }
echo "</table>";
mysqli_close($conn);
?>

编辑;

我现在已将代码更改为此；

<?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 as Waiting_Time FROM Patient";
$result = mysqli_query($conn, $query) or die("Invalid query");

date_default_timezone_set('Europe/London');

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()){


  echo "<tr>
  <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 . "</td>
  </tr>";

}

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

现在显示数据如下；

PatientID Forename Surname Gender Illness     Priority Waiting_Time 
249       Sara     Kearns  F      Immediate   high     2013-03-20 22:18:01

我需要以小时为单位显示的等待时间，例如 1:15:23

4

1 回答 1

1

在 sql 查询中执行此操作，因为您已经在 DB 中有到达时间

$query = "SELECT PatientID, Forename, Surname, Gender, Illness, Priority, Arrival_Time, TIMEDIFF(Arrival_time,NOW()) as Waiting_Time FROM Patient";

同样在您上面的示例中，您唯一比较现在时间和现在时间的时间从未实际与数据库中的 Arrival_Time 进行比较

您的代码的示例修改版本

<?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 , TIMEDIFF(Arrival_time,NOW()) as Waiting_Time FROM Patient";
$result = mysqli_query($conn, $query) or die("Invalid query");

date_default_timezone_set('Europe/London');

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()){


  echo "<tr>
  <td>" . $row[0] . "</td>
  <td>" . $row[1] . "</td>
  <td>" . $row[2] . "</td>
  <td>" . $row[3] . "</td>
  <td>" . $row[4] . "</td>
  <td>" . $row[5] . "</td>
  <td>" . $row[7] . "</td>
  </tr>";

}

echo "</table>";
mysqli_close($conn);
?>
于 2013-03-25T11:31:43.307 回答