a better date calculation in php?

Waubain · 02-04-2012, 03:24 PM

I am a teacher that uses HTML to provide simulations for my students. The simulations have a chronological date time line. Every time I want to use the simulation I have to go in and change all the dates to keep the realistic time line. I started reading about php and what to change the dates dynamically. My simulations on on a local server and do not go outside my class room.

Since dates appear many times in my simulations on many different pages, I am looking for code that works in with the fewest lines of code. The code will almost always be in a table cell.

This simple example works for yesterday's date.

Code:

<body>
<?php
    date_default_timezone_set("America/Chicago");
    $today = time();
    $day = 86400 ;
?>

<table>
    <tr>
	   <td><?php 
                    $newdate = $today - ($day *1); 
                    echo date("m/d/y", $newdate);
                   ?>
           </td>
    </tr>
</table>

</body>

Thank you for any suggestions....Waubain

conor · 03-05-2012, 10:37 PM

to get the current date you could use something like this:

Code:

<body>
<?php
    date_default_timezone_set("America/Chicago");
?>
<table>
    <tr>
	   <td><?php 
                    echo date( "m/d/y" );
                   ?>
           </td>
    </tr>
</table>

</body>

MarkR · 03-06-2012, 08:54 AM

If your function is to appear in many different files I would have one php file called date_inc.php and put your date code in it something like:

PHP Code:


			






    date_default_timezone_set("America/Chicago");

    $today = time();

    $day = 86400 ;



    $newdate = $today - ($day *1); 

    echo date("m/d/y", $newdate);

Then in all your other files you can just use:

PHP Code:


			
require_once('date_inc.php');

That way you only have to change one file to make a global date change.

02-04-2012, 03:24 PM	#1
Waubain New Member Join Date: May 2011 Posts: 4	a better date calculation in php? I am a teacher that uses HTML to provide simulations for my students. The simulations have a chronological date time line. Every time I want to use the simulation I have to go in and change all the dates to keep the realistic time line. I started reading about php and what to change the dates dynamically. My simulations on on a local server and do not go outside my class room. Since dates appear many times in my simulations on many different pages, I am looking for code that works in with the fewest lines of code. The code will almost always be in a table cell. This simple example works for yesterday's date. Code: <body> <?php date_default_timezone_set("America/Chicago"); $today = time(); $day = 86400 ; ?> <table> <tr> <td><?php $newdate = $today - ($day *1); echo date("m/d/y", $newdate); ?> </td> </tr> </table> </body> Thank you for any suggestions....Waubain

03-05-2012, 10:37 PM	#2
conor Gold Member Join Date: Oct 2008 Location: Ireland Posts: 349	to get the current date you could use something like this: Code: <body> <?php date_default_timezone_set("America/Chicago"); ?> <table> <tr> <td><?php echo date( "m/d/y" ); ?> </td> </tr> </table> </body> __________________ Conor

03-06-2012, 08:54 AM	#3
MarkR Silver Member Join Date: Aug 2011 Posts: 100	If your function is to appear in many different files I would have one php file called date_inc.php and put your date code in it something like: PHP Code: `date_default_timezone_set("America/Chicago"); $today = time(); $day = 86400 ; $newdate = $today - ($day *1); echo date("m/d/y", $newdate);` Then in all your other files you can just use: PHP Code: `require_once('date_inc.php');` That way you only have to change one file to make a global date change. __________________ Mark R Wubbleyou - Web Design Newcastle A professional web design agency based in Newcastle upon Tyne servicing clients based throughout the U.K. Home spray tan machine - Landlord Reviews

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