Question

我有一个按月分组的多维元素数组，例如：

Array
(
    [2013-01] => Array
        (
            [0] => Array
                (
                    [Project] => Array
                        (
                            [id] => 1
                            [user_id] => 1
                            [created] => 2013-04-08 01:00:56
                            [modified] => 2013-04-08 01:01:40
                            [vId] => 7
                        )
                )
        )

    [2013-04] => Array
        (
            [2] => Array
                (
                    [Project] => Array
                        (
                            [id] => 1
                            [user_id] => 1
                            [created] => 2013-04-08 01:00:56
                            [modified] => 2013-04-08 01:01:40
                            [refimg] => uploads/smallRef.png
                        )
                )
            [3] => Array
                (
                    [Project] => Array
                        (
                            [id] => 1
                            [user_id] => 1
                            [created] => 2013-04-08 01:00:56
                            [modified] => 2013-04-08 01:01:40
                        )
                )
            [4] => Array
                (
                    [Project] => Array
                        (
                            [id] => 1
                            [user_id] => 1
                            [created] => 2013-04-08 01:00:56
                            [modified] => 2013-04-08 01:01:40
                        )
                )
        )
)

现在我想循环几个月，并且每个月我想对特定月份的数组执行计数：

$currMonth = date('Y-m-d');
while (strtotime($currMonth) >= strtotime($firstMonth)) {
    $curM = date('Y-m', strtotime($currMonth));
    count($grouparr[$curM]);
    $currMonth = date ("Y-m-d", strtotime("-1 month", strtotime($currMonth)));
}

这似乎不起作用。我收到以下错误：

Uncaught SyntaxError: Unexpected token <

如果我手动输入日期，一切正常，例如，如果我在上面的代码中替换它：

count($grouparr["2013-01");

我希望有人可以告诉我我做错了什么

Answer 1

foreach($yourarray as $month) {
 echo sizeof($month);
}

Answer 2

foreach ($grouparr as $month => $values) {

    echo "$month: " . count($values) . "<br />";

}

Answer 3

恕我直言，如果你能提供帮助，请不要使用strtotime（）函数。我不确切知道你的最终结果是什么，但是在迭代这样的数组时让我提供几个选择。

首先，如果您只想循环遍历数组......

foreach ($grouparr as $key => $val) {
    list($year, $month) = explode("-", $key, 2);
    printf("%s, %s has %s records",
        $month,
        $year,
        is_array($val) ? count($val) : 0
    );
}

或许你想要过去12个月......

for ($i = 1; $i <= 12; $i++) {
    //Use this timestamp for all your date calculations
    $mytime = mktime(0, 0, 0, date("n") - $i, 1, date("Y"));

    if (array_key_exists( date("Y-m", $mytime), $grouparr)) {
        printf("%s, %s has %s records",
            date("F", $mytime),
            date("Y", $mytime),
            is_array($grouparr[date("Y-m", $mytime)]) ? count(date("Y-m", $mytime)) : 0
        );
    }
}

这些代码示例可以更简单，但是......

使用变量作为数组索引

3 个答案: