使用MySQLI将DateDiff列添加到PHP表格

Question

我想添加一列到我的数据库表中，显示时间戳和当前日期之间的差异。我试着用DateDiff创建另一个查询，但我不确定我做错了什么。 任何人都可以帮忙吗？

我的代码如下。

<?php 
      $result = mysqli_query($con,"SELECT * FROM pokemon ORDER BY stats"); 

      echo "<table border='1'> 
      <tr> 
      <th>Pokemon Name</th> 
      <th>Type One</th> 
      <th>Type Two</th> 
      <th>Move One</th> 
      <th>Move Two</th> 
      <th>Move Three</th> 
      <th>Move Four</th> 
      <th>Stats</th> 
      <th>ID</th> 
      <th>Date Added</th> 
      <th>Days on File</th> 
      </tr>"; 

      while($row = mysqli_fetch_array($result)) 
      { 
       $query = "SELECT DATEDIFF(CURDATE, $row[dAdded])FROM pokemon AS days"; 
       $date = mysqli_query($con, $query); 


      echo "<tr>"; 
      echo "<td>" . $row['pName'] . "</td>"; 
      echo "<td>" . $row['type1'] . "</td>"; 
      echo "<td>" . $row['type2'] . "</td>"; 
      echo "<td>" . $row['move1'] . "</td>"; 
      echo "<td>" . $row['move2'] . "</td>"; 
      echo "<td>" . $row['move3'] . "</td>"; 
      echo "<td>" . $row['move4'] . "</td>"; 
      echo "<td>" . $row['stats'] . "</td>"; 
      echo "<td>" . $row['ID'] . "</td>"; 
      echo "<td>" . $row['dAdded'] . "</td>"; 
      echo "<td>" . $date . "days</td>"; 
      echo "</tr>"; 
      } 
      echo "</table>"; 
     ?> 

Answer 1

我怀疑的问题是你的DATEDIFF()函数中，更具体地$row[dAdded]。这不应该是$row['dAdded']与报价？而且我相信CURDATE需要括号CURDATE()。

DATEDIFF(CURDATE(), $row['dAdded']) 

Answer 2

您可以将datediff添加到原始查询中。您还需要使用fetch_assoc而不是fetch_array，以便您可以引用$ row中的字段名称。

$result = mysqli_query($con,"SELECT *, DATEDIFF(CURDATE, dAdded) as dDate FROM pokemon ORDER BY stats"); 
while($row = mysqli_fetch_assoc($result)) 
{ 

}