使用DateTime（）获取每月的第N天

Question

I need to get date of 10th day of current month. This way is not working:

<?php 
$date_start = new DateTime();
$date_start->modify('tenth day of this month');
echo $date_start->format('Y-m-d H:i:s'), "
";
?>

Results:

Warning: DateTime::modify(): Failed to parse time string (tenth day of this month ) at position 10 (o): The timezone could not be found in the database in [...][...] on line 3

Of cource, I can use date('Y-m-10') but I need to make it with DateTime() object.

Answer 1

You could use setDate:

$date_start->setDate($date_start->format('Y'), $date_start->format('m'), 10);
echo $date_start->format('Y-m-d H:i:s'), "
";

Output:

2018-10-10 06:49:01