[0] => Array
(
[big] => 中国
[0] => Array
(
[mid] => 北京
[0] => Array
(
[sml] => 海淀
) ) ) [1] => Array
(
[big] => 中国
[0] => Array
(
[mid] => 北京
[0] => Array
(
[sml] => 丰台
) ) )[2] => Array
(
[big] => 中国
[0] => Array
(
[mid] => 上海
[0] => Array
(
[sml] => 许汇
) ) )
[3] => Array
(
[big] => 韩国
[0] => Array
(
[mid] => 首尔
[0] => Array
(
[sml] =>首尔县
) ) )
(
[big] => 中国
[0] => Array
(
[mid] => 北京
[0] => Array
(
[sml] => 海淀
) ) ) [1] => Array
(
[big] => 中国
[0] => Array
(
[mid] => 北京
[0] => Array
(
[sml] => 丰台
) ) )[2] => Array
(
[big] => 中国
[0] => Array
(
[mid] => 上海
[0] => Array
(
[sml] => 许汇
) ) )
[3] => Array
(
[big] => 韩国
[0] => Array
(
[mid] => 首尔
[0] => Array
(
[sml] =>首尔县
) ) )
$b = array();
$c = array_merge($a,$b);
也可以是$c = $a + $b;
(
[big] => 中国
[0] => Array ( [mid] => 北京 [0] => Array ( [sml] => 海淀 , [sml] => 丰台) )
....