我可以在常量PHP中使用嵌套數組

Question

我知道const可以接受一個數組，但我想有一個包含嵌套數組的常量。這可能嗎？

const DAYS_OFF = array(
    'holidays' => array(
    'newYear' => '1 January' 
) 
) 

謝謝

Answer 1

是的，你可以在常量使用嵌套的數組。數組是一個數組，無論深度：

const DAYS_OFF = array(
    'holidays' => array(
    'newYear' => '1 January' 
) 
); 

print_r(DAYS_OFF); 

回報：

Array 
(
    [holidays] => Array 
     (
      [newYear] => 1 January 
     ) 

) 

echo DAYS_OFF['holidays']['newYear']; 

回報

1 January

Answer 2

只能在PHP 7

<?php 
    define('DAYS_OFF', array(
        'holidays' => array(
         'newYear' => '1 January' 
        ) 
       )); 
    print_r(constant("DAYS_OFF")); 
?>