jumlah-hari

<ul>
<?php
$values = array();
$values[] = array('example'=>'example1','date'=>'2020-01-25');
$values[] = array('example'=>'example2','date'=>'2020-02-25');
$values[] = array('example'=>'example3','date'=>'2020-03-25');

$previous = null;
foreach($values as $example){
    echo "<li>".$example['example']." - ".$example['date'];

    if ($previous !== null) {
        $diff = strtotime($example['date'])-strtotime($previous);
        echo " - ".($diff/(60*60*24))." Hari";
    }

    $previous = $example['date'];
    echo "</li>\n";
}

?>
</ul>