I've been working with this DateTimePicker library. I need to catch the value of the date when I click on it and then pass it to the input's value, or just catch the value because the input works with a submit() onChange.
The library has a full code list but I don't use javascript language, I'm more used to PHP, so I don't know how to do it.
<input type="datetime" name="datetimepicker" id="datetimepicker" onChange="submit()" value="here I need to put the picked date">
jQuery.datetimepicker.setLocale('es');
$('#datetimepicker').datetimepicker({
    inline: true,
    parentID: '#datetimepicker',
    minDate: (0),
    dayOfWeekStart: (1),
    timepicker: false,
    disabledWeekDays: [0,
      <?php echo $reserva['lunes']; ?>,
      <?php echo $reserva['martes']; ?>,
      <?php echo $reserva['miercoles']; ?>,
      <?php echo $reserva['jueves']; ?>,
      <?php echo $reserva['viernes']; ?>,
      <?php echo $reserva['sabado']; ?>],
    disabledDates: ['2019-07-23'],
    formatDate:'Y-m-d',
    format: 'Y-m-d H:i',
    formatTime: 'H:i',
    minTime: '8:00',
    maxTime: '21:00',
    step: (60),
    allowBlank: false,
});
 
     
    