In this solution, you will learn a simple way to convert one date format into another date format in PHP.
The second parameter date) needs to be a proper timestamp (seconds since January 1, 1970). You are passing a string, which date() can’t recognize.
You can use strtotime() to convert a date string into a timestamp. However, even strtotime() doesn’t recognize the y-m-d-h-i-s format.
PHP 5.3 and up
Use DateTime::createFromFormat. It allows specifying an exact mask –
Using the date() syntax – to parse incoming string dates with.
PHP5.2 and lower
Parse the elements (year, month, day, hour, minute, second) manually using substr() and hand the results to mktime() which will build a timestamp.
$old_date = date('l, F d y h:i:s'); // returns Saturday, January 30 10 02:06:34
$old_date_timestamp = strtotime($old_date);
$new_date = date('Y-m-d H:i:s', $old_date_timestamp); Another solution
$myDateTime = DateTime::createFromFormat('Y-m-d', $dateString);
$newDateString = $myDateTime->format('m/d/Y');
