Suppose I have a ticket `$create_time = "2016-08-02 12:35:04"`. I want to subtract the `$create_time` from current date and time like `$current_time="2016-08-02 16:16:02"` to find the age in the format `3hr 41min`.

```
<?php

$sql = "SELECT count(*) as total, create_time FROM article where ticket_id='$ticket_id'";
$otrs_db = $this->load->database('otrs',true);
$result = $otrs_db->query($sql);

foreach($result->result() as $row)
{?>
    <div class="pull-left">
        <h4><b><?php echo $row->total ;?> Article(s)</b></h4>
    </div>
    <div class="pull-right">
        <h4>Age: <?php echo date("Y-m-d H:i", strtotime("-$row->create_time",strtotime($thestime))) ?>Created: <?php echo $row->create_time; ?></h4>
    </div>

<?php
}
?>

```

I know my date subtraction code is wrong. How can i do it right?