向内部数组添加键值对

Question

我已经在数组中有数据

 $a = array (
     [2011-07-09] => array(['new'] => 12),
     [2011-07-10] => array(['new'] => 15)
 );

现在我想在内部数组中添加另一个键值对，以便输出类似于

 $a = array (
     [2011-07-09] => array(['new'] => 12, ['recurring'] => 52),
     [2011-07-10] => array(['new'] => 15, ['recurring'] => 80)
 );

我该怎么做？

Answer 1

$a['2011-07-09']['recurring'] = 52;
$a['2011-07-10']['recurring'] = 80;

Answer 2

根据您计划实施recurring密钥的方式，这样做：

$a['2011-07-09']['recurring'] = 52;
$a['2011-07-10']['recurring'] = 80;