Question

我的关联数组$data如下：

Array
(
    [op] => add
    [main_op] => 
    [rebate_id] => 
    [form_submitted] => yes
    [company_id] => 42
    [product_id] => 36
    [applicable_states] => Array
        (
            [0] => Array
                (
                    [state_id] => multiselect-all
                )

            [1] => Array
                (
                    [state_id] => 1
                )

            [2] => Array
                (
                    [state_id] => 2
                )

            [3] => Array
                (
                    [state_id] => 3
                )

            [4] => Array
                (
                    [state_id] => 4
                )

            [5] => Array
                (
                    [state_id] => 5
                )
       )
)

我想将数组$ data [＆＃39; applicable_states＆＃39;]向后移一。为此，我写了下面的代码，但它没有用。你能否帮我纠正我在代码中犯的错误？以下是我的代码。

if (array_search('multiselect-all', $data['applicable_states']) === 0) 
        array_shift($data['applicable_states']);

预期的输出数组如下：

Array
(
    [op] => add
    [main_op] => 
    [rebate_id] => 
    [form_submitted] => yes
    [company_id] => 42
    [product_id] => 36
    [applicable_states] => Array
        (
            [0] => Array
                (
                    [state_id] => 1
                )

            [1] => Array
                (
                    [state_id] => 2
                )

            [2] => Array
                (
                    [state_id] => 3
                )

            [3] => Array
                (
                    [state_id] => 4
                )

            [4] => Array
                (
                    [state_id] => 5
                )
       )
)

Answer 1

您的代码存在一个问题 - 您拥有复杂的数组，因此无法工作 - array_search无法找到该值（将始终返回false）

作为解决方案，您应该简单使用：

if ($data['applicable_states'][0]['state_id'] == 'multiselect-all') {
    array_shift($data['applicable_states']);   
}

Answer 2

就像您的答案和给定的数据一样，您可以简单地array_map和array_filter使用您指定的规格折腾元素。

$data['applicable_states'] = array_filter(array_map(function($v){
    return ($v['state_id'] != 'multiselect-all') ? $v : null;
}, $data['applicable_states']));

http://de3.php.net/manual/en/function.array-map.php

http://php.net/manual/en/function.array-filter.php

我在array_shift函数的代码中写错了吗？

2 个答案: