处理POST数组在PHP和array_filter

Question

这是我的POST数组PHP

    Array
    (
    [book_count] => 2
    [book_code_1] => 230
    [book_name_1] => 20
    [book_code_2] => 210
    [book_name_2] => 40
    [book_code_3] => 
    [book_name_3] => 60
    [book_code_4] => 
    [book_name_4] => 80
    [book_code_5] => 
    [book_name_5] => 90
    )

在上面的数组中，我得到了book_count。即2我想做的是。将有5个数组，我需要根据book_count的值来获取数组的值。

换句话说——在上面的例子中，书的数量是2，我需要得到

    [book_code_1] => 230
    [book_name_1] => 20
    [book_code_2] => 210
    [book_name_2] => 40

我需要消除其他数组(在本例中为3到5)值，而不考虑值。我怎样才能做到呢?

我试过了

<?php $new_array = array_filter($_POST) ?> 

但是这只会消除空值

Answer 1

Demo

您可以通过下面的简单迭代来实现;

$arr = array(
    "book_count" => 2,
    "book_code_1" => 230,
    "book_name_1" => 20,
    "book_code_2" => 210,
    "book_name_2" => 40,
    "book_code_3" => "",
    "book_name_3" => 60,
    "book_code_4" => "",
    "book_name_4" => 80,
    "book_code_5" => "",
    "book_name_5" => 90
    );
$result = array();
for ($i = 1; $i <= $arr["book_count"]; $i++) {
    $result["book_code_" . $i] = $arr["book_code_" . $i];
    $result["book_name_" . $i] = $arr["book_name_" . $i];
}
var_dump($result);