Php 如何从mysql中查找时间总和

你好，我要从我的sql打印时间总和，但我不能请帮助我

$SQL = "SELECT duration FROM core_network ";
$result = mysql_query($SQL);


$c_count='0';
$n="0";
$duration=array();
while ($db_field = mysql_fetch_array($result)) {
$duration[$n]= $db_field['duration'];
 echo $duration[$n];
$n++;
$c_count++;
 }





the result is 18:00:0000:39:0008:00:00


than i found the code from internet


function sum_the_time($Duration) {
 $times = array('18:00:00','00:39:00','08:00:00');
 $seconds = 0;
 foreach ($times as $time)
 {
   list($hour,$minute,$second) = explode(':', $time);
   $seconds += $hour*3600;
   $seconds += $minute*60;
   $seconds += $second;
 }
 $hours = floor($seconds/3600);
 $seconds -= $hours*3600;
 $minutes  = floor($seconds/60);
 $seconds -= $minutes*60;
  // return "{$hours}:{$minutes}:{$seconds}";
 return sprintf('%02d:%02d:%02d', $hours, $minutes, $seconds);
  }
 echo sum_the_time($duration);

---

如何输入$duration[$n]到$times=array（'18:00:00'，'00:39:00'，'08:00:00'）；不需要时间，只需将$duration作为参数传递给函数：

function sum_the_time($times) {
 $seconds = 0;
 foreach ($times as $time)
 {
   list($hour,$minute,$second) = explode(':', $time);
   $seconds += $hour*3600;
   $seconds += $minute*60;
   $seconds += $second;
 }
 $hours = floor($seconds/3600);
 $seconds -= $hours*3600;
 $minutes  = floor($seconds/60);
 $seconds -= $minutes*60;
  // return "{$hours}:{$minutes}:{$seconds}";
 return sprintf('%02d:%02d:%02d', $hours, $minutes, $seconds);
  }
 echo sum_the_time($duration);

---

据我所知，您想将foreach（$duration as$time）而不是foreach（$times as$time）？按echo$row列['totalDuration']从core_网络组中选择SUM（duration）as totalDuration；请不要使用

mysql.*

函数来编写新代码。它们不再得到维护，社区已经开始。看到了吗？相反，你应该学习并使用或。如果你不能决定哪一个，我会帮你的。如果您选择PDO。