effectively print list of used expansions

parse.php

@@ -20,6 +20,7 @@ print $form ;
 }
 else {
    $ext=array() ;
+   $usedExt=array() ;
    $cards=array() ;
    $csvfile = fopen('cards.csv', "r") or die( "unable to open card file" ) ;
    while( $line = fgetcsv( $csvfile ) ){
@@ -62,10 +63,17 @@ else {
    echo "first player is:  $first <br />";
    echo "winner is: $winner<br />" ;
    echo "num of turns: $turns<br />" ;
+   echo "list of expansions used:" ;
+   echo "<ol>" ;
+   foreach ( array_unique($usedExt) as $e ){
+      print( "<li>".$e."</li>" ) ;
+   }
+   echo "</ol>" ;
 
 }
 function guessExpansion( $card, $cards, $ext ) {
+   global $usedExt ;
    if( $key = array_search( $card, $cards)){
-      print( $ext[$key]."<br />" ) ;
+      array_push( $usedExt, $ext[$key] ) ;
    }
 }