PHP 如何从 Mysql 返回 datetime(6)？

Question

When I query a dateTime(6) PHP is truncating my 6 fractional seconds.

Here is an example of my php code:

$sql = 'SELECT date FROM tbl';
        $statement = $connection->prepare($sql);
        $statement->execute();
        $statement->store_result();
        $statement->bind_result($date);
        while ($statement->fetch()) 
        {
        echo $date."\n";
        }

This returns 2014-01-08 21:31:15 instead of 2014-01-08 21:31:15.995000 which is what is stored in the table. How can I get what is actually stored in the table?

Answer 1

The problem is with the PHP Adapter you are using to communicate with Mysql. As far as I can see you are using PDO adapter to fetch the query result. However, this adapter does not support fractional seconds (YYYY-MM-DD HH:MM:SS.F).

The PDO adapter supports YYYY-MM-DD HH:MM:SS and automatically formats the value of datetime columns to this format.

This is a bug in PDO adapter itself. Please find the link below for reference: http://grokbase.com/t/php/php-bugs/11524dvh68/php-bug-bug-54648-new-pdo-forces-format-of-datetime-fields

Answer 2

You can format it to include it. The %f includes the six-digit microseconds .

 SELECT DATE_FORMAT(date, '%Y-%m-%d %H:%i:%s.%f') FROM tbl

Answer 3

It's crazy this still isn't officially supported by mysqli in PHP 7.1, but anyway, here's a work around.

select concat(`DateTime6`)`DateTime6` from ...

Basically casting it as a string worked for me, as ugly as that is.

Answer 4

This bug was finally fixed in PHP v7.3.0.

For related bug details: https://bugs.php.net/bug.php?id=76386

Answer 5

DateTime does not support split seconds (microseconds or milliseconds etc.)

http://www.php.net/manual/en/class.datetime.php

https://bugs.php.net/bug.php?id=51950

Answer 6

in your case you might save the value in MySQL as VARCHAR and case / convert it to datetime when reading it.

I had the same problem and nothing helped me except converting