Now here's what I'd suggest you do. Navigate to your Theme and open the file functions.php
Then find a suitable spot anywhere on the File (The bottom of the file wouldn't be that odd).
Then, add the following functions:
<?php
// FILE-NAME: functions.php <== LOCATED AT THE ___/wp-content/themes/your-theme-name
add_action("init", "initiatePageLogging");
function initiatePageLogging(){
// START THE SESSION IF IT HAS NOT BEEN STARTED
// THIS WOULD BE USED TO SHARE DATA ACROSS YOUR PAGES...
if (session_status() == PHP_SESSION_NONE || session_id() == '') {
session_start();
}
// CHECK THAT THE SESSION VARIABLE FOR OUR PAGE-LOGGING IS THERE
// IF NOT CREATE IT
if(!isset($_SESSION['visitedPages'])){
// IT DOES NOT EXIST SO WE CREATE IT & INITIALIZE IT AS AN EMPTY ARRAY
$_SESSION['visitedPages'] = array();
}
// NO NEED TO KEEP THE SESSION ARRAY $_SESSION['visitedPages'] TOO LONG
// SO WE TRIM IT OUT CONDITIONALLY TO KEEP IT UNDER CHECK
if(count($_SESSION['visitedPages']) >= 10){
// WE REMOVE ABOUT 7 ELEMENTS FROM THE BEGINNING OF THE ARRAY
// LEAVING JUST THE LAST 3 - NOW THAT'S COOL...
$arrVisitedPages = $_SESSION['visitedPages'];
array_splice($arrVisitedPages, 0, 7);
// RE-DEFINE THE $_SESSION['visitedPages'] ARRAY
$_SESSION['visitedPages'] = $arrVisitedPages;
}
}
function getLastVisitedPage(){
$lastVisitedPage = get_site_url() . $_SERVER['REQUEST_URI']; //<== FALL BACK TO THE CURRENT PAGE IF WE HAVE AN ISSUE.
if( isset($_SESSION['visitedPages']) && is_array($_SESSION['visitedPages']) ){
$arrVP = $_SESSION['visitedPages'];
$intArrVPLength = count($arrVP);
$diff = ($intArrVPLength - 2);
$lastVisitedPage = ( $intArrVPLength > 1) ? $arrVP[$diff] : $lastVisitedPage;
}
return $lastVisitedPage;
}
?>
Now, Part 1 is done! Inside of your Theme, You will still find a File Called header.php
This is where we have to do the logging because by default every page in Word-Press loads this Page (except when configured otherwise).
At the very, very top of that File - I mean on Line 1, do this:
<?php
// FILE-NAME: header.php <== LOCATED AT THE ___/wp-content/themes/your-theme-name
// BUILD THE URL OF THE CURRENT PAGE & PUSH IT TO THE SESSION VARIABLE...
$thisPage = get_site_url() . $_SERVER['REQUEST_URI'];
$_SESSION['visitedPages'][] = $thisPage;
// THAT'S ALL! BELOW HERE, THE ORIGINAL CONTENT OF THE header.php FILE CONTINUES...
?>
One more thing! How do we now use the $_SESSION['visitedPages'] Variable?
Otherwise, how do we know which page was last visited using the $_SESSION['visitedPages'] Variable?
Now on every File like (page.php, index.php, category.php, taxonomy.php, etc); you can now find out the last visited Page by doing something like this:
<?php
// FILE-NAME: ANY FILE IN THE THEME LIKE: page.php, index.php, category.php, taxonomy.php, etc
$lastVisitedPage = getLastVisitedPage();
// THAT'S IT, PAL...
?>
I hope this helps....