在PHP中計算表的深度總和平均值

Question

我有一個php代碼來計算顯示的登錄時間和計數。 但我想結束表格，我想計算每個列結束時的總持續時間和登錄次數。 在rove結束時，我想計算平均登錄時長和平均登錄次數，即總時長/項目數。但不能這樣做。 你能給我一個提示嗎？

$result = mysql_query("SELECT connection_log.user, `count(*) as   'connection_count', sum(TIMESTAMPDIFF(MINUTE,connection_log.logondate, connection_log.logoffdate)) as `connection_time` 
FROM connection_log 
INNER JOIN users ON connection_log.user=users.user 
WHERE users.groups 
LIKE '%cpg_sirket_dyo%' and connection_log.logondate>='2015-09-01 00:00:00' and connection_log.logoffdate<'2015-10-01 00:00:00' 
group by connection_log.user 
order by connection_count desc",$con); 
echo '<table width="80%" border="1" align="center" cellspacing="0" cellpadding="0">'; 
echo " <tr> 
    <th> Row number </th> 
    <th> Username </th> 
    <th> Total login count </th> 
    <th> Total login duration(min.) </th> 
    </tr> "; 
$counter = 1; 
while ($row = mysql_fetch_array($result, MYSQL_BOTH)) 
{ 
echo " <tr> 
     <td> ". $counter ." </td> 
     <td> ". $row['user'] . "</td> 
     <td> ". $row['connection_count'] ." </td> 
     <td> ". $row['connection_time'] ." </td> 
     </tr> "; 
$counter++; 
} 

//SUM CALCULATION 
//NEED HERE! 
// 
echo "</table><br>\n"; 
echo $icounter. " Items<br>\n"; 

mysql_close($con); 

Answer 1

存儲陣列中的全部信息，並在年底計算平均值：

while ($row = mysql_fetch_array($result, MYSQL_BOTH)) 
{ 
echo " <tr> 
     <td> ". $counter ." </td> 
     <td> ". $row['user'] . "</td> 
     <td> ". $row['connection_count'] ." </td> 
     <td> ". $row['connection_time'] ." </td> 
     </tr> "; 
$connection_count[] = $row['connection_count']; 
$connection_time[] = $row['connection_time']; 

$counter++; 

} 

$meanCount = array_sum($connection_count)/count($connection_count); 
$meanTime = array_sum($connection_time)/count($connection_time); 

// do what ever you like with it 

echo "</table><br>\n"; 

希望這有助於