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thisishard

Ok, I have a variable which is a date, "2010.03.09" - yyyy.mm.dd
I want to subtract one day from it and echo out "2010.03.08" or what ever the value is from subtracting one from the date given.
Any help appreciated
Thanks

Makeshift

Give this a try:

$d = date(\"d\")-1;
$date = date(\"Y.m.\".$d);
echo $date;

Makeshift

Wait, if it's a variable that's already set, I would use this function:

function fix_date($var){
	$var = explode(\".\", $var);
	$day = $var[2];
	$day = $day-1;
	while(strlen($day)<2){
		$day = '0'.$day;
	}
	$var = $var[0].'.'.$var[1];
	$var .= '.'.$day;
	echo $var;
}
fix_date('2010.03.09');

There's probably easier ways to go about doing this, but this is what I would do.

thisishard

Thanks for the reply, would this code work if the date was the first and changing to the last day of the previous month?

Makeshift

Unfortunately it does not. But what you could do is set the timezone 24hrs backwards...

Makeshift

This function is a bit longer, but see if it works..

function fix_date($var){
	$var = explode(\".\", $var);
	$jan = \"31\";
	if(date(\"L\") == 1){
		$feb = 29;
	}else{
		$feb = 28;
	}
	$mar = 31;
	$apr = 30;
	$may = 31;
	$jun = 30;
	$jul = 31;
	$aug = 31;
	$sep = 30;
	$oct = 31;
	$nov = 30;
	$dec = 31;

	$year = $var[0];
	$month = $var[1];
	$day = $var[2];
	$day = $day-1;
	if($day < 1){
		$month = $month-1;
		if($month > 1){
			if($month == 1){
				$day = $jan;
			}elseif($month == 2){
				$day = $feb;
			}elseif($month == 3){
				$day = $mar;
			}elseif($month == 4){
				$day = $apr;
			}elseif($month == 5){
				$day = $may;
			}elseif($month == 6){
				$day = $jun;
			}elseif($month == 7){
				$day = $jul;
			}elseif($month == 8){
				$day = $aug;
			}elseif($month == 9){
				$day = $sep;
			}elseif($month == 10){
				$day = $oct;
			}elseif($month == 11){
				$day = $nov;
			}elseif($month == 12){
				$day = $dec;
			}
		}else{
			$month = 12;
			$year = $year-1;
			$day = $dec;
		}
	}
	while(strlen($day)<2){
		$day = '0'.$day;
	}
	while(strlen($month)<2){
		$month = '0'.$month;
	}
	$var = $year . '.' . $month . '.' . $day;
	echo $var;
}
fix_date('2010.03.09');

If the day is january 1st, 2010 it will output: 2009.12.31

thisishard

I'd hate to be a pain but.... what about leap years :/
sorry.
As a side not i found this bit of code which seems to do the trick for the guy who made it but i cant get it to work.

$date = \"1998-08-14\";
$newdate = strtotime ( '-3 day' , strtotime ( $date ) ) ;
$newdate = date ( 'Y-m-j' , $newdate ); 
echo $newdate;

I tried to make this work,

$date = (\"01.03.2010\");
$newdate = strtotime ( '+1 day' , strtotime ( $date ) ) ;
$newdate = date ( 'd-m-Y' , $newdate );
echo $newdate;

But it fails miserably.
Any ideas?

davesgonebananas

"thisishard" said:
I tried to make this work,
$date = (\"01.03.2010\");
$newdate = strtotime ( '+1 day' , strtotime ( $date ) ) ;
$newdate = date ( 'd-m-Y' , $newdate );
echo $newdate;
But it fails miserably.
Any ideas?

Works like a charm for me, what's your problem exactly?

thisishard

On mine it echoes '02-01-1970' rather than '02-03-2010'.

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