Outputs the WordPress header

[dadomagico 0]

Hi,in my site http://www.mobiliariofarmacia.es/
at the top appairs this error:
/** Outputs the WordPress header. */ require_once(ABSPATH . 'wp-head.php');

How can i resolve?
I have updated the theme and also wordpress ma doesn't work
Please Help me!

[Danny+ 1,327]

Hi,

 

For that to appear there you either have one of the following:

 

1. A plugin causing the error.

2. You have added a hook or function to the functions.php which is causing the issue.

3. You have made edits to the core files which is causing the issue.

[dadomagico 0]

Hi,

 

For that to appear there you either have one of the following:

 

1. A plugin causing the error.

2. You have added a hook or function to the functions.php which is causing the issue.

3. You have made edits to the core files which is causing the issue.

I have disabled all plugins but the error remains.

i have not added any hook to the functions.php

Where are the core files?

[Simon 248]

Answered here: https://wordpress.org/support/topic/wordpress-error-in-header?replies=18#post-6623025

Your site is infected with a backdoor as far as i can see.