array_switch( array , current , type )

session_start();
//session_destroy();die;




$games['BFBC2'] = 'BFBC2';
$games['BF3'] = 'BF3';
$games['BFP4F'] = 'BFP4F';
$games['MOHW'] = 'MOHW';
$games['CRY1'] = 'CRY1';
$games['CRY2'] = 'CRY2';
$games['CRY3'] = 'CRY3';







function array_switch($array, $current='', $type='val')
{
    function sortType($key, $val, $type)
    {
        if($type == 'key'){
            return($key);
        }else{
            return($val);
        }
    }
    function chkArray($array)
    {
        if(!isset($array)){
            $missing = true;
        }
        elseif(is_bool($array)){
            $_type_ = 'boolean';
        }elseif(is_string($array)){
            $_type_ = 'string';
        }elseif($array == null){
            $_type_ = 'null';
        }
        if(isset($missing)and $missing === true){
            echo '<b>Warningsss</b>: Missing argument 1 for array_switch()';
            return false;
        }
        if(isset($type)){
            echo '<b>Warning</b>: array_switch() expects parameter 1 to be array, '.$_type_.' given';
            return false;
        }
    }




    if(chkArray($array) === false){
        return false;
    }




    foreach($array as $key => $val){
        if(!isset($selected)){
            $selected = sortType($key, $val, $type);
        }
        $possibilities[] = sortType($key, $val, $type);
    }




    if(!isset($current)or empty($current)){
        return($possibilities[key($possibilities)]);
    }




    foreach($possibilities as $key => $val){
        if($current == $val){
            if(@!$selected = $possibilities[$key+1]){
                $selected = $possibilities[key($possibilities)];
            }
            return($selected);
        }
    }
}




// call array_switch()
$_SESSION['selected_game'] = array_switch($games, @$_SESSION['selected_game'], 'key' );




// test
foreach($games as $key => $val){
    echo '<br />'.$val;
    if($_SESSION['selected_game'] == $key){
        echo '<';
    }
}