[SOLVED] gregorian to unix

[XpertWorlock]

Trying to build a function that changes a gregorian time to unix time.  This function should work, but I am thinking the problem is with the 'GregoriantoJD' function not being able to process $month,$day,$year.  Anyways, if someone could make this work

 

function gtu($gregoriantime)
{
$month = date('m', strtotime($gregoriantime));
$day = date('d', strtotime($gregoriantime)); 
$year = date('Y', strtotime($gregoriantime)); 
$jd = GregorianToJD($month,$day,$year);
$unixtime = jdtounix($jd);
return $unixtime;
};

 

 

 

 

$test = gtu(10/20/2008);

echo $test;  

 

Outputs nothing

 

[Guardian-Mage]

I am no expert with PHP time, but shouldn't it be:

 

$test = gtu("10/20/2008");

echo $test; 

 

See the quotes?

 

EDIT: Just tried it, and the quotes fixed it

[XpertWorlock]

Yeah I tried it too, and it works perfectly.

 

Thanks, always the simplest thing that screws it up

[DarkWater]

Umm...strtotime() would already give you a Unix time.  Unless I'm completely misunderstanding your goal.

[XpertWorlock]

The goal is to get gregorian to unix time as clean as possible, if you have a better way, feel free to say it

[DarkWater]

Yeah, wouldn't this just give you the exact same result?

 

echo strtotime('10/20/2008');

[XpertWorlock]

It does in a way, but your way makes it at 5am (Why I don't know?)

 

yours make this

 

1224478800

  10/20/2008 5:00 GMT

 

mine makes this

1224460800

  10/20/2008 0:00 GMT

 

 

Could this have something to do with server settings or something?

Doesn't strtotime have something to do with the client or whatever.

 

I'm from Eastern Canada, so my time is -5 GMT

 

 

 

 

 

 

[XpertWorlock]

http://www.csgnetwork.com/unixds2timecalc.html

 

Unix to Gregorian, to test if you need to.

[DarkWater]

You could always use date_default_timezone_set('UTC') if you want GMT time.

[XpertWorlock]

No I don't think GMT is really needed in this.

 

/*Converts Gregorian month/day/year to unix time*/
function gtu($gregoriantime)
{
$month = date('m', strtotime($gregoriantime));
$day = date('d', strtotime($gregoriantime)); 
$year = date('Y', strtotime($gregoriantime)); 
$jd = GregorianToJD($month,$day,$year);
$unixtime = jdtounix($jd);
return $unixtime;
};


/*Converts unix time to gregorian*/
function utg($unixtime)
{
$julius=unixtojd($unixtime);
$Gregorian=jdtogregorian("$julius");
return $Gregorian; 
};


$starttime = "10/20/2008"; 

echo $starttime."= the date we started with<br>";

$test = gtu("$starttime");

echo $test."= This is the outcome of gregorian to unix<br>";

$test = utg("$test");

echo $test."= This is the outcome of unix to gregorian<br>";

 

 

This outputs the unix time of = "1224460800"  Which is 10/20/2008 0:00 GMT

 

when I change it back to Gregorian it comes up 10/19/2008.

 

I'm digging myself in deeper, but just so everyone knows, there is a point to this.

 

 

So what's the matter with this :

 

function utg($unixtime)
{
$julius=unixtojd($unixtime);
$Gregorian=jdtogregorian("$julius");
return $Gregorian; 
};

 

that it comes up the wrong day?

 

 

Even this :

date('m/d/Y', 1224460800);

 

Which is 10/20/2008, comes up 10/19/2008

 

[DarkWater]

And what does:

date('m/d/Y', 1224468800);

Yield?  My guess is that it's your server, and strtotime() and date() would be the easiest and most efficient way to do this.

[XpertWorlock]

It's all timezone screw ups.

 

date_default_timezone_set('GMT')

 

Thanks Dark Water, since you cleaned up a bunch of unneeded coding too

[DarkWater]

No problem.  You can also set the timezone in your php.ini if you don't want to have to include that line in every page.  If you do decide to do it like that  though, I'd suggest throwing it in a general header file that you just include.