How to convert dd/mm/yy to YYYY-MM-DD datetime format in php

Here's an easy way to convert EU datetime format to ISO 8601 datetime format in php.

$dateInputFormat='d/m/y H:i:s';
$dateOutputFormat='Y-m-d H:i:s';

DateTime::createFromFormat($dateInputFormat,$datetime)->format($dateOutputFormat);

Hope it Helps!