Fix wordpress errors and upgrade to newest version

I moved a site a while ago,

I'm getting errors now appearing on the site, see below for example..... they are appearing on top of pages...

I need wordpress repaired and upgraded to newist version, will probably just upgrade automatically I guess.

its on cpanel.

Thanks

Deprecated: Assigning the return value of new by reference is deprecated in /home/mysite/public_html/[login to view URL] on line 512

Deprecated: Assigning the return value of new by reference is deprecated in /home/mysite/public_html/[login to view URL] on line 527

Deprecated: Assigning the return value of new by reference is deprecated in /home/mysite/public_html/[login to view URL] on line 534

Deprecated: Assigning the return value of new by reference is deprecated in /home/mysite/public_html/[login to view URL] on line 570

Deprecated: Assigning the return value of new by reference is deprecated in /home/mysite/public_html/wp-includes/[login to view URL] on line 103

Deprecated: Assigning the return value of new by reference is deprecated in /home/mysite/public_html/wp-includes/[login to view URL] on line 61

Deprecated: Assigning the return value of new by reference is deprecated in /home/mysite/public_html/wp-includes/[login to view URL] on line 1109

Warning: Cannot modify header information - headers already sent by (output started at /home/mysite/public_html/[login to view URL]) in /home/mysite/public_html/wp-includes/[login to view URL] on line 850

PHP WordPress

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