PHP DateTime issue

Question

I've run into something unusual. For some reason when adding a dateinterval with only minutes set in it makes it add 67 years.

$wTime = new DateTime("2011-05-17 01:54:56 +0000");
echo $wTime->format("d/m/Y H:i:s\n");
$wTime->add(new DateInterval("P810M")); 
echo $wTime->format("d/m/Y H:i:s");

The result is:

17/05/2011 01:54:56
17/11/2078 01:54:56

I can't see where I'm doing anything wrong. Is this a bug in the DateTime object, or is something off with my code? I've run into annoying bugs with it in the past. I am running the latest version of PHP (5.3.6) built from source on Mac OS X 10.6

Rich Adams · Accepted Answer · 2011-05-18 02:38:06Z

1

M is for months, so this is adding 810 months (67.5 years). Use i or I for minutes.

$wTime->add(new DateInterval("P810I"));

The PHP manual page for DateInterval has a complete list of the recognized formats.

answered May 18, 2011 at 2:38

Rich Adams

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Jason McCreary · Accepted Answer · 2011-05-18 02:38:17Z

0

Check the docs, you're adding 810 months (~67 years). Try PT810M

answered May 18, 2011 at 2:38

Jason McCreary

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2 Comments

Yoshi Over a year ago

Thanks, this fixed it. I can't believe I made a post about such a stupid mistake. How shameful.

Jason McCreary Over a year ago

No worries. I'll admit the fact that PHP has M for both month and minutes is pretty lame. Looks like I is an alternative for minutes format. But from the docs, T is the documented way to specify M as minutes.

user348716 · Accepted Answer · 2011-05-18 02:39:05Z

0

You are actually adding 810 months instead of minutes. Try -

$wTime->add(new DateInterval("P810I"));

Also looks like the PHP documentation is wrong. But if you look at the example output on that page, you will realise that the code for minutes is 'i', not 'm'.

answered May 18, 2011 at 2:39

user348716

1 Comment

Yoshi Over a year ago

Thanks. I can at least blame the PHP documentation partly for my stupidity :/

Crashspeeder · Accepted Answer · 2011-05-18 02:39:32Z

0

You added months, not minutes. Try i instead of m

answered May 18, 2011 at 2:39

Crashspeeder

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