php 数组字符串，如果转为数组

Question

各位童鞋，这种数组字符串如何转为数组。。。

$arr=array (
  'address' => '["河北省","秦皇岛市","海港区"]',
);
如何将 字符串转为一个数组

// array("河北省","秦皇岛市","海港区")

Answer 1

$arr=array ( 'address' => '["河北省","秦皇岛市","海港区"]', );

$addr = json_decode($arr['address']);
print_r($addr);