PHP "Cannot use object of type StdClass as array" (PHP error when calling Json_decode to generate a JSON object from a string object)

PHP calls Json_decode to generate a JSON object from a string object, and if you use the [] operator to fetch data, you get the following error

Error:
Cannot use object of type StdClass as array

Cause:

+ Expand

-php

$res = Json_decode ($res);

$res [' key ']; Use the object after Json_decode () as an array.

Solution (2 types):
1. Use Json_decode ($d, True). is to make the second variable of Json_decode set to true.
2. Json_decode ($res) Returns an object that cannot be accessed using $res [' key '], instead of $res->key.


Reference manual: Json_decode

Return Values:returns An object or if the optional assoc parameter are TRUE, an associative array is instead returned.

The return value is the JSON object by default, and when the second optional argument is true, the array is returned

PHP "Cannot use object of type StdClass as array" (PHP error when calling Json_decode to generate a JSON object from a string object)