php : in array

ArrayMap.php

<?php
        $array = array(
            1 => array('n' => 'a1', 'p' => 1, 't' => 'a', 'bk' => array('2'), 'cd' => 2),
            2 => array('n' => 'a2', 'p' => 2, 't' => 'a', 'ak' => array('3', '4'), 'cd' => 1),
            3 => array('n' => 'a3', 'p' => 3, 't' => 'a', 'cd' => 1),
        );
        $ret = in_array(false, array_map(function ($item) {
            return $item['cd'] ? true :false;
        }, $array));
        var_dump($ret);