Laravel date_format字段验证向后吗？

Question

I'm trying to determine where the issue is here. I'm taking an input of something like "01-02-2018" to refer to January 02, 2018. Then creating a variable to fix it as a standard 2018-01-02 DATE formate for mySQL and saving it. However, when it saves, it is saving it as 2018-02-01, transposing the month and day, which represents February 01, 2018. Here is what my code looks like:

Validation

'prescribe_date' => 'nullable|date_format:"m-d-Y"|max:10',

Fix

$prescribe_dateFix = date('Y-m-d', strtotime($request->prescribe_date));

Save

$prescription->prescribe_date = $prescribe_dateFix;

Answer 1

strtotime will interpret your date as dmY by default so it will think it is 1st February. From the manual:

Note:

Dates in the m/d/y or dmy 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 dmy format is assumed.

You need to use date_create_from_format instead:

$request = (object)['prescribe_date' => '01-02-2018'];
$prescribe_dateFix = date_create_from_format('m-d-Y', $request->prescribe_date)->format('Y-m-d');
echo $prescribe_dateFix;

Output:

2018-01-02

Answer 2

你可以试试看

$prescribe_dateFix = date_format($request->prescribe_date, 'Y-m-d')

Answer 3

The "Laravelish" way of achieving this is using the built-in Carbon library for smart PHP date manipulation:

// Perform validation and then...
$prescription->prescribe_date = Carbon::createFromFormat('m-d-Y', $request->prescribe_date);
$prescription->save();

Of course, you should also specify that the prescribe_date field is a date within the corresponding model class (see https://laravel.com/docs/5.7/eloquent-mutators#date-mutators ):

In Prescription model class:

protected $dates = [
    'created_at',
    'updated_at',
    'prescribe_date'
];