String Overloading

$fruffi = new String;
$fruffi->set('                      string ');
var_dump
(
    $fruffi
    ->trim()
    ->toUpper()
    ->leftJoin(new String('carambolage'), new String(', '))
    ->leftJoin(new String('creëre'), new String(' '))
    ->rightJoin(new String('.'))
    ->get()
);
var_dump('contains creëre (case-sensitive)', $fruffi->contains(new String('creëre'), new Boolean(true))->get() );
var_dump('contains Creëre (case-sensitive)', $fruffi->contains(new String('Creëre'), new Boolean(true))->get() );
var_dump('contains Creëre (ignore cases)'  , $fruffi->contains(new String('Creëre'))->get() );
var_dump('isUtf8', $fruffi->isUtf8()->get() );

var_dump($fruffi->restore()->get());


/*
string(27) "creëre carambolage, STRING."
string(32) "contains creëre (case-sensitive)"
bool(true)
string(32) "contains Creëre (case-sensitive)"
bool(false)
string(30) "contains Creëre (ignore cases)"
bool(true)
string(6) "isUtf8"
bool(false)
string(29) "                      string "
*/