PHP DateTime::createFromFormat not working

Question

DateTime::createFromFormat doesn't appear to be working correctly, does anyone know a reason and/or how to fix it?

Given this code:

var_dump(DateTime::createFromFormat('m', '02')->format('m'));
var_dump(DateTime::createFromFormat('n', '2')->format('n'));

My expected output would be

02
2

However I actually get:

03
3

Example: http://codepad.viper-7.com/e4hns6

I've tested this on a multitude of servers including:

Win PHP 5.4
Linux PHP 5.3
Viper Codepad

php.net/manual/en/function.mktime.php#77490

Taha Paksu
– Taha Paksu

2012-04-30 04:03:25 +00:00
Commented Apr 30, 2012 at 4:03 — Taha Paksu
– Taha Paksu, Commented Apr 30, 2012 at 4:03
@tpaksu thanks, that explains why it happens.

Petah
– Petah

2012-04-30 04:11:36 +00:00
Commented Apr 30, 2012 at 4:11 — Petah
– Petah, Commented Apr 30, 2012 at 4:11

Hamish · Accepted Answer · 2012-04-30 04:05:25Z

4

From the manual:

"If format does not contain the character ! then portions of the generated time which are not specified in format will be set to the current system time."

The following should work as expected:

var_dump(DateTime::createFromFormat('!m', '02')->format('m'));
var_dump(DateTime::createFromFormat('!n', '2')->format('n'));

# result:
string(2) "02"
string(1) "2"

answered Apr 30, 2012 at 4:05

Hamish

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2 Comments

Petah Over a year ago

Well that works for my use case. But out of curiosity, what if I wanted to only parse the month, and use the current year/day/time?

Matthew Over a year ago

@Petah, that's what you are doing (with your original code). But there aren't 30 days in February, the second month, so it's advancing to the third month. The ! defaults to 1970-01-01 00:00:00, so it avoids that problem.

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