PHP 数组中子键的平均值

Array (
  [JohnDoe] => Array (
  [id] => 23
  [name] => JohnDoe
  [logintimes] => 30
)
 [JaneDoe] => Array (
  [id] => 26
  [name] => JaneDoe
  [logintimes] => 9
)
 [Smith] => Array (
  [id] => 35
  [name] => Smith
  [logintimes] => 9
 )
)

我将如何通过将登录时间彼此相加（然后找到它们的平均值？）

非常简单的循环并得到它

$counter = 0;
$total = 0;
foreach($array as $row) {
    $counter++;
    $total += $row['logintimes'];
}
echo $total / $counter;