Преобразование datepicker в Mysql Date - PHP

Привет, моя цель - преобразовать формат datepicker в Date в mysql, как я: моя форма:

$data_inizio = $connessione->real_escape_string($_POST['data_inizio']);
$data_fine = $connessione->real_escape_string($_POST['data_fine']);

<div class = "md-form">
<!--The "from" Date Picker -->
<input name = "data_inizio" placeholder = "Data inizio" type = "text" id = "startingDate" class = "form-control datepicker">
<label for = "startingDate">Inizio</label>
</div>
<div class = "md-form">
<!--The "to" Date Picker -->
<input name = "data_fine" placeholder = "Data Fine" type = "text" id = "endingDate" class = "form-control datepicker">
<label for = "endingDate">Fine</label>
</div>