如何在数组以及对应的日期中找到最大值和最小值

乔汉

我有一个数组，我想放一些

Array
    (
[0] => Array
    (
        [DaySession1] => 
        [DaySession] => 
        [SubmitSessionDate] => 
        [id] => 
    )

[1] => Array
    (
        [DaySession2] => 
        [DaySession] => 
        [SubmitSessionDate] => 
        [id] => 
    )

[2] => Array
    (
        [DaySession3] => 2
        [DaySession] => 2
        [SubmitSessionDate] => 2014-09-03 23:58:56
        [id] => 2120
    )

[3] => Array
    (
        [DaySession4] => 10
        [DaySession] => 10
        [SubmitSessionDate] => 2014-09-04 00:06:39
        [id] => 2121
    )

[4] => Array
    (
        [DaySession5] => 
        [DaySession] => 
        [SubmitSessionDate] => 
        [id] => 
    )

[5] => Array
    (
        [DaySession6] => 
        [DaySession] => 
        [SubmitSessionDate] => 
        [id] => 
    )

[6] => Array
    (
        [DaySession7] => 6
        [DaySession] => 6
        [SubmitSessionDate] =>  2014-09-05 00:06:39
        [id] => 
    )

这是我即将到来的数组，我想要上述数组的最大[DaySession]值，并且还想要相应的[SubmitSessionDate]

同样，我也想从上述数组和相应的[SubmitSessionDate]中获得最小的[DaySession]值吗？

结果应为：

Maximum Day session = 10 and SubmitSessionDate = 2014-09-04 00:06:39
Minimum Day Session =2  and SubmitSessionDate = 2014-09-03 23:58:56

凯文

你可以得到当天的会议与他们的钥匙一起，然后从那里你可以使用ksortreset()和end()。示例：演示

$keys = array();
foreach($array as $key => $val) {
    if(!empty($val['DaySession'])) {
        $keys[$val['DaySession']] = $key;
    }
}

ksort($keys);
$min_key = reset($keys);
$max_key = end($keys);

echo "Maximum Day session = ".$array[$max_key]['DaySession']." and SubmitSessionDate = ".$array[$max_key]['SubmitSessionDate']." <br/>";
echo "Minimum Day session = ".$array[$min_key]['DaySession']." and SubmitSessionDate = ".$array[$min_key]['SubmitSessionDate'];

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