Calculating amount of days between two dates without using date functions

[liquidentropy]

Can anyone help me with this i'm not sure how to do it.  Still learning PHP and I cant quite figure it out

 

Write a function that takes two arbitrary dates in the format 'YYYY-MM-DD' and calculates the amount of days between them without using any php date functions.

 

Thanks

[cooldude832]

try

<?php
//Start
$day1 = "2008-01-10";
//End
$day2 = "2008-01-15";
//Time in seconds
$time = date("U",strtotime($day2))-date("U",strtotime($day1));
//86400 seconds in a day so
$days = round($time/86400);
echo "There are ".$time." seconds between ".$day2." and ".$day1." <br />and ".$days." days between ".$day2." and ".$day1.".";
?>

 

give that a go

 

Edit:

missed a ) so if you copied it once recopy it

[Ken2k7]

But that uses the date function, cooldude82.

[cooldude832]

But that uses the date function, cooldude82.

 

and I quote php.net

 

Requirements

 

No external libraries are needed to build this extension.

Installation

 

There is no installation needed to use these functions; they are part of the PHP core.

 

If its deafult installed you can't say I don't want to use it not a valid argument

[liquidentropy]

Good solution but still uses date functions.  Is there any way to do it without using the date functions.  ???