functions.php freezing admin

When i insert my functions.php code
<blockquoe>
<?php {
register_sidebar(array(‘name’=>’left’,
‘before_widget’ => ”,
‘after_widget’ => ”,
‘before_title’ => ‘<h1>’,
‘after_title’ => ‘</h1>’,
));
register_sidebar(array(‘name’=>’middle’,
‘before_widget’ => ”,
‘after_widget’ => ”,
‘before_title’ => ‘<h1>’,
‘after_title’ => ‘</h1>’,
));
register_sidebar(array(‘name’=>’right’,
‘before_widget’ => ”,
‘after_widget’ => ”,
‘before_title’ => ‘<h1>’,
‘after_title’ => ‘</h1>’,
));
register_sidebar(array(‘name’=>’sidebar’,
‘before_widget’ => ”,
‘after_widget’ => ”,
‘before_title’ => ‘<h1>’,
‘after_title’ => ‘</h1>’,
)); }
?>

it causes admin to freeze when posting or writing a page. What am I missing? When I remove functions.php, everything works great