Parsing postgres datetime with timezone with optional microseconds - php

Question

I want to parse postgres datetime with timezone by DateTime::createFromFormat(). But I don't know, how to compose $format parameter.
$dates = [
'2016-03-04 10:29:40+01',
'2016-03-04 10:29:40.123456+01',
];
$format = 'Y-m-d H:i:s.uP';
foreach ($dates as $value) {
$dt = DateTime::createFromFormat($format, $value);
var_dump($dt);
}
bool(false)
object(DateTime)#2 (3) {
["date"]=>
string(26) "2016-03-04 10:29:40.123456"
["timezone_type"]=>
int(1)
["timezone"]=>
string(6) "+01:00"
}
First date is not parsed, second yes.

Answer 1

Edit
As you want DateTime::createFromFormat() solution only, you'll face a problem: createFromFormat() don't support optional part. There is no way to parse directly a string that may have microsecond.
One of the hack you can do is searching for the . that's used for the ms part, and change your pattern on the fly:
<?
$dates = [
'2016-03-04 10:29:40+01',
'2016-03-04 10:29:40.123456+01',
];
foreach ($dates as $value) {
$format = (strpos($value,'.')===FALSE) ?'Y-m-d H:i:sP':'Y-m-d H:i:s.uP';
$dt = DateTime::createFromFormat($format, $value);
var_dump($dt);
}
PHP::strtotime() is probably the best solution if you can't format your output with Postgresql::to_char()
<?
echo date('Y-m-d H:i:s.uP', strtotime('2016-03-04 10:29:40+01'));
// 2016-03-04 01:29:40.000000-08:00
echo date('Y-m-d H:i:s.uP', strtotime('2016-03-04 10:29:40.123456+01'));
// 2016-03-04 01:29:40.000000-08:00