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<?php $son = '{ "1":{ "id":"1", "name":"jack" }, "2":{ "id":"2", "name":"john" } }'; $json = json_decode($son); //var_dump($json); var_dump($json->{'1'}); // correct result $index = 1; var_dump($json->$index); // correct result
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
object(stdClass)#1 (2) { ["id"]=> string(1) "1" ["name"]=> string(4) "jack" } object(stdClass)#1 (2) { ["id"]=> string(1) "1" ["name"]=> string(4) "jack" }
Output for 5.6.38
object(stdClass)#2 (2) { ["id"]=> string(1) "1" ["name"]=> string(4) "jack" } object(stdClass)#2 (2) { ["id"]=> string(1) "1" ["name"]=> string(4) "jack" }

preferences:
171.2 ms | 401 KiB | 213 Q