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Problems modifying date using regex [message #169962]

Sat, 02 October 2010 02:23

Rob
Messages: 5
Registered: October 2010

Karma:

Junior Member

I've (yet again) run into an issue with PHP that makes me question my
sanity.

I have a number of form letters available that include an option for
modifying the date contained within. For example, a letter may
reference a future date like "Please respond by {{DATE+10}}.", and a
past date could be "{{DATE-10}}".

I've got a regex that pulls the relevant information out of the letter
('/\{\{DATE([+\-])(\d{1,3})\}\}/i'), which tells me that I need to
eitheradd or subtract days. I'm passing \1 and \2 to a function which
appears verbatim below:

function _format_date ($op, $days) {
$date = new DateTime ();
$date -> modify ($op . $days . ' day');
return ($date -> format ('Y-m-d'));
}

Given the example showing exactly this operation at php.net (http://
us.php.net/manual/en/datetime.modify.php), one would expect it to
work. Unfortunately, it simply returns the current date.

I've verified that \1 and \2 are correctly being passed to the
function as $op and $days. I've tried casting the vars with no
difference. I've tried encasing them in a string ("$op$days day"), and
assigning the string to a separate variable. In all cases, it returns
the current date without modification and acts as though $op and $days
are null.

I've verified that simply using the string "+10 day" works as
expected, but there seems to be something special about using the
values from a regex that causes this to fail.

Please help!

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[Message index]

		Problems modifying date using regex By: Rob on Sat, 02 October 2010 02:23
		Re: Problems modifying date using regex By: Jerry Stuckle on Sat, 02 October 2010 03:08
		Re: Problems modifying date using regex By: Rob on Sat, 02 October 2010 03:24
		Re: Problems modifying date using regex By: Captain Paralytic on Sat, 02 October 2010 09:20
		Re: Problems modifying date using regex By: Rob on Sat, 02 October 2010 14:11
		Re: Problems modifying date using regex By: Rob on Sat, 02 October 2010 15:43

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