php 如何把字符中的數組格式數據 轉化爲真實數組數據

先看數據

Array
(
    [id] => 82
    [by] => folder_id
    [names] => 跑跑車輛
    [type] => attrs
    [offset] => 0
    [page_id] => 1
    [page_size] => 15
    [article_table] => attrs
    [ext] => [
'key'  => 'dir',
'data' => [
'app' => ['id'=>'82,154', 'names' => 'app,跑跑卡丁車', 'article_table' => 'tags'],
'xinwen'  => ['id'=>'159', 'names' => '跑跑卡丁車', 'article_table' => 'tags'],
'pingce'  => ['id'=>'82', 'names' => '跑跑卡丁車車輛', 'article_table' => 'attrs'],
'cheshou' => ['id'=>'82', 'names' => '跑跑卡丁車人物', 'article_table' => 'attrs'],
'ditu'    => ['id'=>'82', 'names' => '跑跑卡丁車賽道', 'article_table' => 'attrs'],
'tupian'  => ['id'=>'82', 'names' => '跑跑卡丁車遊戲圖片', 'article_table' => 'attrs']
]]
)

實現思路：把數組先轉化爲json字符串，然後把字符串轉化爲數組
代碼：
$extJson = str_replace(['=>', "'", '[', ']'], [':', '"', '{', '}'], $ext);
$extArr = json_decode($extJson, true);

如何檢測json格式是否正確，請參考我另一篇文章：https://blog.csdn.net/liuxl57805678/article/details/102912796