3v4l.org

run code in 500+ PHP versions simultaneously
<?php $str = '[ { "id":"1", "f_name":"Mitrajit", "l_name":"Samanta", "class":"XII", "section":"A,B,C", "roll":"1", "status":"1" } ]'; $json = json_decode($str, true); $json[0]["section"] = explode(",", $json[0]["section"]); $json = json_encode($json); print_r($json);
Output for 5.6.38, 7.1.0 - 7.1.22, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
[{"id":"1","f_name":"Mitrajit","l_name":"Samanta","class":"XII","section":["A","B","C"],"roll":"1","status":"1"}]

preferences:
100.65 ms | 1461 KiB | 4 Q