After switching from PHP 5.6 to PHP 7 I get the following error message (in the backend):

"
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; plgContentCjblog has a deprecated constructor in /www/htdocs/w00bea54/i-p-p/plugins/content/cjblog/cjblog.php on line 21

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; plgContentArticleSuggestions has a deprecated constructor in /www/htdocs/w00bea54/i-p-p/plugins/content/articlesuggestions/articlesuggestions.php on line 24
"

Going back to PHP 5.6 the error disappears. But this cannot be the solution.

How can you help me?