How to add "Last updated on xx/xx/xx" in Joomla

I need to add a site-wide "last updated on xx/xx/xx", meaning that if any pages would have been edited or added, the PHP script would display the most recent article. Is this possible? Yes or no? If yes, then how?
mpaertAsked:
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markh789Commented:
You want to check when a file was last edited?

<?php
// if windows use C:/path/to/the/file.php
$get_file_time = filectime("/full/path/to/the/file.php");
$formateddate = date("F j, Y", $s);
echo("Las Updated on " . $formateddate);
?

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mpaertAuthor Commented:
Dear Markh,

Thank you, but I'm not looking for file date, but last change date of a MySQL database.
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adamjimenezCommented:
in that case you need to add a timestamp field to your database.

then select the most recent timestamp:

"select timestamp from table order by timestamp" - where timestamp is the name of your timestamp column.
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manavsiCommented:
try lookin in this thread... may be it will help you...
Link: http://forum.joomla.org/viewtopic.php?t=28343

HTH
manavsi
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j-b-tCommented:
If are you just wanting to show
"last updated on    xxx" - actually by default "last modified on" will show  -
on every page - go to yoursite.com/administrator/content (along top)
click article manager in drop down
in article manager clilick parameters (top right)
in parameters select "show" on Modified Date and Time - click save top right

This sets the default for all articles - within each article you also have the choice to manually set these parameters
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mpaertAuthor Commented:
Hi jbt,

Thank you, I am aware of this function. What I want is a PHP script that looks at all "Last modivied" dates on the database from specific categories. I want to display on the homepage, when the site was last modified.
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j-b-tCommented:
OK - then you just need a module to display last date anything modified - so why not just modify  the newsflash or latest news module to do this
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markh789Commented:
j-b-t's method works.
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