Beaucoup d'erreurs à l'install de PunBB sur 1&1

Est-ce dû au php 7 ?

1/

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; DBLayer has a deprecated constructor in /homepages/18/d149996993/htdocs/bambou/forum/include/dblayer/sqlite3.php on line 16

2/

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; DBLayer has a deprecated constructor in /homepages/18/d149996993/htdocs/bambou/forum/include/dblayer/sqlite3.php on line 16 Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /homepages/18/d149996993/htdocs/bambou/forum/include/dblayer/sqlite3.php:16) in /homepages/18/d149996993/htdocs/bambou/forum/include/functions.php on line 65 Warning: session_regenerate_id(): Cannot regenerate session id - headers already sent in /homepages/18/d149996993/htdocs/bambou/forum/include/functions.php on line 70 Warning: Cannot modify header information - headers already sent by (output started at /homepages/18/d149996993/htdocs/bambou/forum/include/dblayer/sqlite3.php:16) in /homepages/18/d149996993/htdocs/bambou/forum/header.php on line 16 Warning: Cannot modify header information - headers already sent by (output started at /homepages/18/d149996993/htdocs/bambou/forum/include/dblayer/sqlite3.php:16) in /homepages/18/d149996993/htdocs/bambou/forum/header.php on line 17 Warning: Cannot modify header information - headers already sent by (output started at /homepages/18/d149996993/htdocs/bambou/forum/include/dblayer/sqlite3.php:16) in /homepages/18/d149996993/htdocs/bambou/forum/header.php on line 18 Warning: Cannot modify header information - headers already sent by (output started at /homepages/18/d149996993/htdocs/bambou/forum/include/dblayer/sqlite3.php:16) in /homepages/18/d149996993/htdocs/bambou/forum/header.php on line 19 Warning: Cannot modify header information - headers already sent by (output started at /homepages/18/d149996993/htdocs/bambou/forum/include/dblayer/sqlite3.php:16) in /homepages/18/d149996993/htdocs/bambou/forum/header.php on line 22