Insert date value in Mysql DB - php

Question

I'm trying to insert a date value in a MySQL table like this (using Laravel 5.1):
public function update(Request $request, $id)
{
$user = User::findOrFail($id);
$data = $request->all();
$data['birthdate'] = date("Y-d-m", strtotime($data['birthdate']));
...
$user->fill($data)->save();
It works fine if I insert a date which the day < 12, while it'll be inserted 1970-01-01 if day > 12 !
I've used Eloquent mutators in User model like this :
public function getBirthdateAttribute() {
return date('d/m/Y', strtotime($this->attributes['birthdate']));
}
public function setBirthdateAttribute($value) {
$this->attributes['birthdate'] = Carbon::createFromFormat('Y-m-d', $value);
}
Please what's the matter with my code !?

Answer 1

change this:
date("Y-d-m", strtotime($data['birthdate']));
to:
date("Y-m-d", strtotime($data['birthdate']));
http://dev.mysql.com/doc/refman/5.7/en/date-and-time-literals.html
where your should be like this format dd-mm-yyyy, and if it like this dd/mm/yyyy
$date = '22/05/2012';
$date = str_replace('/', '-', $date);
$date = date('Y-m-d', strtotime($date));

Answer 2

This is the piece of the strtotime() manual you need to read and understand
Note:
Dates in the m/d/y or d-m-y formats are disambiguated by looking at the separator between the various components: if the separator is a slash (/), then the American m/d/y is assumed; whereas if the separator is a dash (-) or a dot (.), then the European d-m-y format is assumed. If, however, the year is given in a two digit format and the separator is a dash (-, the date string is parsed as y-m-d.
To avoid potential ambiguity, it's best to use ISO 8601 (YYYY-MM-DD) dates or DateTime::createFromFormat() when possible.
So because you are using the / as a seperator strtotime() is assuming the American date format and getting the day and month parts confused