[marz]

There are 4 sitiations of which I resolves 3 but not the 4th

SS (Branch ending with 2 descendents => stop routine)

KS/SK (Branch with one descendent and one further branch => keep looping)

KK (Two branches => keep looping but it get complex looping to remember both branches)

while (($run<>0)   // if run=0 stop looping

	{
		unset ($key);
		$Qtxn = 'SELECT taxon,thiskey,child,typ  FROM ' . $table . ' WHERE  thiskey='.$k.'';  
		$Rtxn = mysql_query($Qtxn) or die ('Error in query: ' . $Qtxn .  mysql_error());
		while ($row = mysql_fetch_array($Rtxn)) {$key[] = $row; }

		print "Now working on key $k - - - switch: $run ";


// Access tree ($table) walk through its branches and get data for each branch into an array ($key[])
"<br>";
	

// $taxa = array to place extracted descendents
//kk situation where it makes things complex
	
		if ($key[0]['typ']=='k' AND $key[1]['typ']=='k') 
			{ 
				print "<b>[KK]</b> : ";
				$k = 	$key[0]['child']; print "nextkey = $k " ; 
				$k2 = $key[1]['child']; print "and = $k2 <br>" ; 
				$run = 1; $run2 = 1;
				
			}//if
//ks situation, works fine			
		if ($key[0]['typ']=='k' AND $key[1]['typ']=='s') 
			{
				print "<b>[KS]</b> : ";
				array_push($taxa, $key[1]['taxon']);
				$k = 	$key[0]['child']; print "nextkey = $k <br>" ; 
				$k2 ='';
				$run = 1;  
				
			}	//if

//sk situation, works fine
		
		if ($key[0]['typ']=='s' AND $key[1]['typ']=='k') 
			{
				print "<b>[SK]</b> : ";
				array_push($taxa, $key[0]['taxon']);
				$k = 	$key[1]['child']; print "nextkey = $k <br>";
				$k2 ='';
				$run = 1;  
			}//if

//ss situation, works fine, both branches are descendents, stop looping ($run set to 0)		
	  if ($key[0]['typ']=='s' AND $key[1]['typ']=='s') 
			{ 
				print "<b>[SS]</b> : ";
				array_push($taxa, $key[0]['taxon'], $key[1]['taxon']);
				$run = 0;   print "End <br>";
				$k2 ='';
			} //if