Subtracting dates

[gerkintrigg]

Hiya. I'm trying to work out what the best way is to find the difference between dates.

 

I have it in a variable so i think something like this should work... (Pseudo code only... i know the syntax etc is wrong)

 

if ((current_date-start_date)>=4weeks){

// if the start date is more than 4 weeks away:

price=(price/3);

}

 

any suggestions would be really helpful.

 

thanks.

[c_shelswell]

The best way to do this is to convert them in to unix timestamps then you can easily add and subtract them i think what you're looking for is "strtotime" so get your date then find out what 4 weeks in advance is so i guess 60*60*24*31 i think gives you a month of seconds.

 

Hope this helps

[gerkintrigg]

cool thanks, I'm trying to use this:

if (($my_date_now-strtotime($start_date))<=(strtotime(+4 weeks,$my_date_now)-$my_date_now)){
		$deposit_payable
	}

 

it returns:

Parse error: syntax error, unexpected T_STRING in /home/tichborn/public_html/includes/date_check_2.php on line 50

 

I know what the problem is, but not how to resolve it. Could someone help please?

[c_shelswell]

I take it the "$my_date_now" variable is a unix timestamp not a date? Perhaps a silly question.

[gerkintrigg]

yeah, time();

[c_shelswell]

could you paste the chunk of your actual code.

 

I think the problem might be this bit: "strtotime(+4 weeks,$my_date_now)"

 

what i would do is have:

 

 

$future_date = $my_date_now + 2678400; //this gives 4 weeks in the future

 

you can then have

 

if (($my_date_now-strtotime($start_date))<=(strtotime($future_date)-$my_date_now)){

$deposit_payable; // i noticed you never had the ";" there

}

 

if you paste the actual code it might be easier.

 

Cheers

[gerkintrigg]

In the end i did this:

$my_date_now=time();
	$future_date = strtotime('+4 weeks',$my_date_now); 
	if (($start_date-$future_date)>=0){
         $deposit_payable='y'; 
      	}

 

Thanks for the pointer though.