Weird install error

Trying to install C5.6.3.4 and get the following:

Warning: Declaration of Concrete5_Model_Page::add(CollectionType $ct, $data) should be compatible with Concrete5_Model_Collection::add($data) in /var/www/vhosts/ on line 12
Warning: Declaration of Concrete5_Model_Page::duplicate($nc, $preserveUserID = false) should be compatible with Concrete5_Model_Collection::duplicate() in /var/www/vhosts/ on line 12

How can I resolve this as I am not familiar with php?

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hutman replied on at Permalink Reply
What version of PHP are you trying to use for install? is not PHP 7 compatible and this looks like that might be what you're trying to use.