如何从多维数组中动态获取信息

Question

我想收集每个membership_name值，并显示它。我尝试了一些foreach循环，但是它们总是将我的drupal安装警告为无效的foreach（）命令。

这是print_r（$ myMemberships）;

 Array
 (
 [1] => Array
    (
        [3] => Array
            (
                [id] => 3
                [membership_id] => 3
                [contact_id] => 1
                [membership_contact_id] => 1
                [membership_type_id] => 1
                [join_date] => 2011-08-23
                [start_date] => 2011-08-23
                [membership_start_date] => 2011-08-23
                [status_id] => 2
                [is_override] => 1
                [is_test] => 0
                [member_is_test] => 0
                [is_pay_later] => 0
                [member_is_pay_later] => 0
                [membership_name] => Orientation
                [relationship_name] => Volunteer for
            )

        [4] => Array
            (
                [id] => 4
                [membership_id] => 4
                [contact_id] => 1
                [membership_contact_id] => 1
                [membership_type_id] => 2
                [join_date] => 2011-08-23
                [start_date] => 2011-08-23
                [membership_start_date] => 2011-08-23
                [status_id] => 2
                [is_override] => 1
                [is_test] => 0
                [member_is_test] => 0
                [is_pay_later] => 0
                [member_is_pay_later] => 0
                [membership_name] => Field Production
                [relationship_name] => Volunteer for
            )

        [5] => Array
            (
                [id] => 5
                [membership_id] => 5
                [contact_id] => 1
                [membership_contact_id] => 1
                [membership_type_id] => 3
                [join_date] => 2011-08-23
                [start_date] => 2011-08-23
                [membership_start_date] => 2011-08-23
                [status_id] => 2
                [is_override] => 1
                [is_test] => 0
                [member_is_test] => 0
                [is_pay_later] => 0
                [member_is_pay_later] => 0
                [membership_name] => Graphic Design
                [relationship_name] => Volunteer for
            )

    )

[record_count] => 7
)

此外，我想将每个membership_name确保为变量，以便向用户授予如下权限：

 <?php
      if ($orientation) {

      // execute code

 } else {

      // otherwise execute

 }

 <?php
      if ($fieldproduction) {

      // execute code

 } else {

      // otherwise execute

 }

 // etc... etc...

这就是我用它来调用它，可能是完全错误的：

 foreach ( $myMemberships as $myMembership ) {
    foreach ( $myMembership as $value => $final ) {
        echo 'hello';
    }
}

Answer 1

这是导致问题的数组底部的record_count项。您的外部循环将为7分配内部循环$myMemberShip。然后你尝试对7做一个foreach - 因为它不是一个数组，你得到警告。

Answer 2

如果那是您的数组，那么您需要在myMemberships[1]中查找成员，因此您的代码应为

foreach ($myMemberships[1] as $myMembership ) {
    foreach ( $myMembership as $value => $final ) {
        // here you have membership properties
    }
}

如果你的数组是动态的，你必须检查它，所以你应该做这样的事情

foreach ($myMemberships[1] as $myMembership ) {
    if (is_array($myMembership)) {
        foreach ( $myMembership as $value => $final ) {
            // here you have membership properties
        }
    }
}