项目从Codeigniter 22升级至 Codeigniter 30的一些注意事项

<span>//</span><span> Old</span><span>$this</span>->session->unset_userdata(<span>array</span>('item' => '', 'item2' => ''<span>));

</span><span>//</span><span> New</span><span>$this</span>->session->unset_userdata(<span>array</span>('item', 'item2'));

<span>$active_group</span> = 'default'<span>;
</span><span>//</span><span> $active_record = TRUE;</span><span>$query_builder</span> = <span>TRUE</span><span>;

</span><span>//</span><span>$db['default']['dbdriver'] = 'mysql';</span><span>$db</span>['default']['dbdriver'] = 'mysqli';

(.+)    <span>//</span><span> matches ANYTHING</span>(:any)  <span>//</span><span> matches any character, except for '/'</span>