web site hacked

See various ways to gain access to your site, including editing your active theme’s functions.php file and uploading an emergency password reset script.

https://codex.www.ads-software.com/Resetting_Your_Password

Respond here if you need additional help (or contact me directly if you cannot post specific details publicly.)

i try to add a new administrator using function.php but in vain
any other solution please ?

Respond here if you need additional help (or contact me directly if you cannot post specific details publicly.)

@gappiah, We appreciate you taking the time to help out. Thank you for that. But we have to ask you not to contact people (or ask people to contact yourself).
https://make.www.ads-software.com/support/handbook/forum-welcome/#the-bad-stuff

@imen1, Below is our stock-reply to hacked installations:

You need to start working your way through these resources:

• https://codex.www.ads-software.com/FAQ_My_site_was_hacked
• https://www.ads-software.com/support/topic/268083#post-1065779
• https://smackdown.blogsblogsblogs.com/2008/06/24/how-to-completely-clean-your-hacked-wordpress-installation/
• https://ottopress.com/2009/hacked-wordpress-backdoors/

Additional Resources:

• https://sitecheck.sucuri.net/scanner/
• https://www.unmaskparasites.com/
• https://blog.sucuri.net/2012/03/wordpress-understanding-its-true-vulnerability.html

i try to add a new administrator using function.php but in vain

What actually happened?

any other solution please ?

Did you also try the database and emergency reset script options on the link I gave?