Online PHP editor | output for gdGrk

<?php $json = json_decode('{ "lifeExp": "2 Days", "certificates": [ { "name": "CCS Group Pte Ltd", "signed": "22/05/2020 10:31:00", "revoked": "23/05/2020 5:40:00", "files": { "p12": "certificates/:id/certificate.p12", "pem": "certificates/:id/certificate.pem", "key": "certificates/:id/certificate.key", "password": "certificates/:id/certificate.password" } }, { "name": "Hoola Inc", "signed": "16/05/2020 12:40:00", "revoked": "19/05/2020 04:00:00", "files": { "p12": "certificates/:id/certificate.p12", "pem": "certificates/:id/certificate.pem", "key": "certificates/:id/certificate.key", "password": "certificates/:id/certificate.password" } } ] }', true); $signed = $json['certificates'][1]['signed']; $revoked = $json['certificates'][1]['revoked']; $newTimeAdd = DateTime::createFromFormat('d/m/Y H:i:s', $signed); $newTimeRead = DateTime::createFromFormat('d/m/Y H:i:s', $revoked); $interval = $newTimeAdd->diff($newTimeRead); echo $interval->days;