Hi Stephen, thank you very much for your time, you are truly a genius to me!

Almost there....
The only thing missing is to return the city banner when the style is not there but this expression is:
searchword29=GAT
searchword29=MTL
searchword29=QC

The problem I have is that this URL will follow the city of the teacher /emilie (which is montreal), but we are not at emilie's page anymore, the URL has been overriden by a search:

http://www.quebecguitare.ca/professeurs … Itemid=926

Therefore ?searchword29=QC should override "montreal" in this case and return the banner from Québec (QC)

Here is my new code, this is the only thing doesn't work I think so far in my debug process:
// teacher ids who will receive banner X
// the banner module id comes first followed by array of teacher names that may appear in the URL
$teachers = array(
  874 => array('/gabriel', '/clement', '/felix',  '/daniel', '/francis', '/jean-c', '/emilie'),  // Montréal
  875 => array('/simon-mart','/simon-gag','/simon-gue','/guylaine'),                      // Québec
  873 => array('/philippe') // (last item in list does not end in comma)                 // Gatineau
);

$styleModules = array(
  'Acoustique'=>858, // module to display for classique
  'Électrique'=>859, // module to display for classique
  'Blues'=>860, // module to display for classique
  'Classique'=>862, // module to display for classique
  'Country'=>863, // module to display for classique
  'Débutant'=>864, // module to display for classique
  'Enfants'=>865, // module to display for classique
  'Folk'=>867, // module to display for classique
  'Jazz'=>868, // module to display for classique
  'Metal'=>869, // module to display for classique
  'Rock'=>870, // module to display for classique
  'Ukulélé'=>872 // module to display for classique (last item in list does not end in comma)         
);

$hasCity = $core_genius->check("url contains searchword29");
$hasStyle = $core_genius->check("url contains searchword31");

if ($hasCity and $hasStyle) {
  $style = JRequest::getVar("searchword31");
  return @$styleModules[$style];
}

// if we get to here, it's missing city or style or both.
// now check for teacher names in URL:
$teacherModule = null;
foreach ($teachers as $m_id => $teacher) {
  if ($core_genius->check("url contains any of ",$teacher)) {
    $teacherModule = $m_id;
  }
}

// no city, no style, but has a teacher: show module for the city that teacher is associated with
if (!$hasCity and !$hasStyle and $teacherModule) {
  return $teacherModule;
}

// has a style and a teacher: disregard city of teacher and display style banner
if ($hasStyle and $teacherModule) {
  $style = JRequest::getVar("searchword31");
  return @$styleModules[$style];
}

// if we reach here then it was none of the scenarios above! e.g. may have teacher and city but no style.
// so perhaps we can add this one:
if ($hasCity and $teacherModule) {
  return $teacherModule;
}
// end!


Thank you, have a great weekend Stephen.
Regards

Ok, I think the only thing that has to change is the last set of checks. In the last section I guessed that if there's a teacher and a city, that we should use the city of the teacher. But you're saying that the teacher (alone) gets overridden by the new city search, that means we take the city instead of the teacher's city. So try this:

// teacher ids who will receive banner X
// the banner module id comes first followed by array of teacher names that may appear in the URL
$teachers = array(
  874 => array('/gabriel', '/clement', '/felix',  '/daniel', '/francis', '/jean-c', '/emilie'),  // Montréal
  875 => array('/simon-mart','/simon-gag','/simon-gue','/guylaine'),                      // Québec
  873 => array('/philippe') // (last item in list does not end in comma)                 // Gatineau
);

$styleModules = array(
  'Acoustique'=>858, // module to display for classique
  'Électrique'=>859, // module to display for classique
  'Blues'=>860, // module to display for classique
  'Classique'=>862, // module to display for classique
  'Country'=>863, // module to display for classique
  'Débutant'=>864, // module to display for classique
  'Enfants'=>865, // module to display for classique
  'Folk'=>867, // module to display for classique
  'Jazz'=>868, // module to display for classique
  'Metal'=>869, // module to display for classique
  'Rock'=>870, // module to display for classique
  'Ukulélé'=>872 // module to display for classique (last item in list does not end in comma)         
);

$hasCity = $core_genius->check("url contains searchword29");
$hasStyle = $core_genius->check("url contains searchword31");

if ($hasCity and $hasStyle) {
  $style = JRequest::getVar("searchword31");
  return @$styleModules[$style];
}

// if we get to here, it's missing city or style or both.
// now check for teacher names in URL:
$teacherModule = null;
foreach ($teachers as $m_id => $teacher) {
  if ($core_genius->check("url contains any of ",$teacher)) {
    $teacherModule = $m_id;
  }
}

// no city, no style, but has a teacher: show module for the city that teacher is associated with
if (!$hasCity and !$hasStyle and $teacherModule) {
  return $teacherModule;
}

// has a style and a teacher: disregard city of teacher and display style banner
if ($hasStyle and $teacherModule) {
  $style = JRequest::getVar("searchword31");
  return @$styleModules[$style];
}

// if we reach here then it was none of the scenarios above! e.g. may have teacher and city but no style.
// In this case we take the city, not the city of the teacher
if ($hasCity and $teacherModule) {
  $city = JRequest::getVar('searchword29');
  if ($city == 'GAT') return 873;
  if ($city == 'MTL') return 874;
  if ($city == 'QC') return 875;
}
// end!

...meanwhile....

LOL! Yes about logic.

So far the scenario has banners with one element on it: either the city or the style.
I was asking about the possibilities of combining both city and style on the same banner when the search result calls for that.

But maybe this is a completely different set of logic. Do you think it would be possible to insert this new scenario in the current logic.

I think the current logic was based on making choices when presented with 2 variables, so I am not too sure about this.

Thank you
Regards

I did more troubleshooting.

This URL structure doesn't seem to work with the City or the Style search alone, but when combined the right banner is returned.

Ex.: with City only
http://www.quebecguitare.ca/professeurs … Itemid=850

Ex.: with Style only
http://www.quebecguitare.ca/professeurs … Itemid=850

Result:
No banner is returned

Expected Result;
Current logic would apply

Updated Code:

// teacher ids who will receive banner X 

// the banner module id comes first followed by array of teacher names that may appear in the URL 

$teachers = array( 

  874 => array('/thomas-d', '/thomas-b', '/gabriel', '/clement', '/felix',  '/daniel', '/francis', '/jean-c', '/emilie', '/montreal/liste'),          // Montréal

  875 => array('/simon-mart','/simon-gag','/simon-gue','/guylaine', '/quebec/liste'),                                                                   // Québec

  873 => array('/philippe', '/gatineau/liste') // (last item in list does not end in comma)                                                            // Gatineau

); 



$styleModules = array( 

  'Acoustique'=>858, // module to display for classique

  'Électrique'=>859, // module to display for classique

  'Blues'=>860, // module to display for classique

  'Classique'=>862, // module to display for classique

  'Country'=>863, // module to display for classique

  'Débutant'=>864, // module to display for classique 

  'Enfants'=>865, // module to display for classique

  'Folk'=>867, // module to display for classique

  'Jazz'=>868, // module to display for classique

  'Metal'=>869, // module to display for classique 

  'Rock'=>870, // module to display for classique

  'Ukulélé'=>872 // module to display for classique (last item in list does not end in comma)         

); 



$hasCity = $core_genius->check("url contains searchword29"); 

$hasStyle = $core_genius->check("url contains searchword31"); 



if ($hasCity and $hasStyle) { 

  $style = JRequest::getVar("searchword31"); 

  return @$styleModules[$style]; 

} 



// if we get to here, it's missing city or style or both. 

// now check for teacher names in URL: 

$teacherModule = null; 

foreach ($teachers as $m_id => $teacher) { 

  if ($core_genius->check("url contains any of ",$teacher)) { 

    $teacherModule = $m_id; 

  } 

} 



// no city, no style, but has a teacher: show module for the city that teacher is associated with 

if (!$hasCity and !$hasStyle and $teacherModule) { 

  return $teacherModule; 

} 



// has a style and a teacher: disregard city of teacher and display style banner 

if ($hasStyle and $teacherModule) { 

  $style = JRequest::getVar("searchword31"); 

  return @$styleModules[$style]; 

} 



// if we reach here then it was none of the scenarios above! e.g. may have teacher and city but no style. 

// In this case we take the city, not the city of the teacher 

if ($hasCity and $teacherModule) { 

  $city = JRequest::getVar('searchword29'); 

  if ($city == 'GAT') return 873; 

  if ($city == 'MTL') return 874; 

  if ($city == 'QC') return 875; 

}  

// end!

Thank you
Regards