Canot login. Warnings regarding array and "cannot modify header information"

Hello,

Today my site ceased to function. Site won’t load, and cannot login. Errors regarding array ad “Cannot modify header information.

I then logged in through cpanel, removed the active plugins php list, and this gained me access to the site again, and all seemed fixed. Then the same problem reoccured with differing php documents listed as the problem.

I tried again to remove the active plugin php list to regain control, but it did not work the second time, only more Warning errors.

Can you please help?

D