How to calculate time difference (duration) between 2 times

edited April 2023 in PHP

Php code :

$in_time =  date('H:i', strtotime($ci_time_a[$i])); // date('H:i', strtotime('9:00'))

                            $out_time =  date('H:i', strtotime($co_time_a[$i])); // date('H:i', strtotime('6:00'))

                            $datetime1 = new DateTime($out_time);

                            $datetime2 = new DateTime($in_time);

                            $interval = $datetime1->diff($datetime2);

echo $interval->format('%h') . " Hours " . $interval->format('%i') . " Minutes";

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