Erreur

My version 1.4.5.

I have several problems, the first: visual studio running for hours (create a clan, setting clan …).

My second problem here it is (debug mode)

Notice: La méthode constructor appelée pour WP_Widget est obsolète depuis la version 4.3.0 ! Veuillez utiliser

__construct()

à la place. in wp-includes/functions.php on line 3457

Warning: Cannot modify header information – headers already sent by (output started at wp-includes/functions.php:3457) in wp-includes/pluggable.php on line 1207

Thank you for all your help