在PHP中合并两个数组

Question

I have two arrays:

$a = array([0]=>1 [1]=>2 [2]=>3);
$b = array([0]=>a [1]=>b [2]=>c);

I want to merge them like

$ab=array( [a]=>array([0]=>1 [1]=>2 [2]=>3) 
           [b]=>array([0]=>a [1]=>b [2]=>c)  );

How to do this ?

I tried array_merge() but it does not work as I want it to.

Answer 1

在这种情况下，您可以执行以下操作：

$ab = array('a' => $a, 'b' => $b);

Answer 2

You can use compact() method:

$ab = compact('a', 'b');

where 'a' and 'b' will used as array keys and treated as variable names to assign values, so it will do array('a' => $a, 'b' => $b)

Answer 3

您已经写了答案了。

$ab = array('a' => $a, 'b' => $b);

Answer 4

$ab = array('a' => $a, 'b' => $b);

Will result in:

$ab['a'] = array([0] => 1, [1] => 2, [2] => 3);
$ab['b'] = array([0] => a, [1] => b, [2] => c);

Or you can just do $ab = array($a, $b) if you don't want the keys (it is unclear in your question if a and b are strings or integers).