Insert different date format with php to mysql - php

Question

I have an upload script written in PHP which takes care of data from CSVs and inserts it into each specific table for each CSV that is uploaded.
I need to fix an issue with it not inserting data from a different date format correctly. It needs to cover all date formats and save it like YYYY-MM-DD (2016-09-27), except time.
It looks like this:
Database table:
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
USER VARCHAR(50) NOT NULL,
Date DATE,
Time TIME
PHP/MySQL
$stmt = $conn->prepare("INSERT INTO ".$table_name." (User, Date,Time) VALUES (?,?,?)");
$stmt->bind_param("sss", $user, $date,$time);
$user = $data_array[$i][0];
$date = $data_array[$i][1];
$time = $data_array[$i][2];
$stmt->execute();
I've been reading about STR_TO_DATE but I'm not sure where I should use it in this case.

Answer 1

At first i noticed your define the vars after u use them with bind_param()
$user $date $time
Like this:
$user = $data_array[$i][0];
$date = $data_array[$i][1];
$time = $data_array[$i][2];
$stmt->bind_param("sss", $user, $date,$time);
Next:
You can use MySQL Date Format functions.
See: https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-format
With this function you can convert your string date into a valid MySQL date.
VALUES(?,DATE_FORMAT('?','format'),?)
Replace format with the format the data is in
Example from Manual: SELECT DATE_FORMAT('2009-10-04 22:23:00', '%W %M %Y');