- var_dump: documentation ( source)
- json_decode: documentation ( source)
- var_export: documentation ( source)
<?php
$json = '{"str":true,"123":true}';
$arr1 = json_decode($json, true);
$arr2 = (array)json_decode($json);
var_export($arr1);
var_export($arr2);
var_dump(isset($arr1['str']), isset($arr1['123']), isset($arr2['str']), isset($arr2['123']));