如何将日期选择器输入中的日期转换为PHP中的某种格式？ [重复]

I am new to PHP. I have a date string from a date-picker input field. But when I try to convert date string it into a date, I get an unexpected date.

Sample error:

• If input ($datestamp) contains 24/01/2016, then it becomes $date = '70/01/01 [error]

Here is the PHP code:

<?php  
    $datestring = (isset($_POST['datetimepicker1'])) ? $_POST['datetimepicker1'] : "not";

    $date = date("y/d/m", strtotime($datestring));      
    echo   $datestring; 
    echo   var_dump($date);     
?>

updates: here is my datepicker code

<script type="text/javascript">
        $(function () {
            $('#datetimepicker1').datetimepicker({format:"DD/MM/YYYY", useCurrent: false });
        });         
 </script>

Please help me fix this. Is this a format problem? I need to insert the date into an Oracle database.

</div>

According to jQuery, the datepicker default format is the following: mm/dd/yy.

So, you can try this (in order to convert the $datestring to the y/m/d format):

<?php
$datestring = '24/01/2016';
list($day, $month, $year) = explode('/', $datestring);
$date = DateTime::createFromFormat('Ymd', $year . $month . $day);
echo $date->format('y/m/d');
?>

You can also change the datepicker:

var date = $('#datepicker').datepicker({ dateFormat: 'dd-mm-yy' }).val();

Use this code

<?php  
$datestring = (isset($_POST['datetimepicker1'])) ? $_POST['datetimepicker1'] : "not";
$datestring = str_replace('/', '-', $datestring);
$date = date("y/d/m", strtotime($datestring));      
echo   $datestring; 
echo   var_dump($date);     

?>

Just replace('/') to ('-') before passing to strtotime function. Sometime ('/') not work.

Please replace date function with below code. I have used explode to extract year, month and date separately, pass it to strtotime function.

<?php  
    $datestring = (isset($_POST['datetimepicker1'])) ? $_POST['datetimepicker1'] : "not";
    $date_arr = explode('/',$datestring);
    $date = date("Y/m/d", strtotime($date_arr[2].$date_arr[1].$date_arr[0]));
    echo   $datestring; 
    echo   var_dump($date);     
?>