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。将有五个数组，我需要获得相对于book_count的数组值。

换句话说 - 在上面的例子中，书数是2，我需要得到

    [book_code_1] => 230
    [book_name_1] => 20

    [book_code_2] => 210
    [book_name_2] => 40

无论值如何，我都需要消除其他数组（在本例中为3到5）。我怎样才能做到这一点？

我试过了

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

但这只是消除了空值。

Answer 1

<强> Demo

你可以通过下面的简单迭代来做到这一点;

$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);

在PHP和array_filter中处理POST ARRAY

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