back office HTTP 500 internal server error

[Bassam45]

Hi everyone

i unable to log in to my back office, only started this morning! i get blank screen, website works fine only the back office, i am hoping that with your knowledge you can help me

my website back office is https://www.cockpitsimparts.co.uk/cockpitadmin

i have contacted the host and they give me those errors

These are the errors coming from your site 
Deprecated: Function mcrypt_decrypt() is deprecated in /home/cockpits/public_html/classes/Rijndael.php on line 68

Warning: Cannot modify header information - headers already sent by (output started at /home/cockpits/public_html/classes/Rijndael.php:68) in /home/cockpits/public_html/classes/Cookie.php on line 343

Fatal error: Declaration of AdminLoginControllerCore::viewAccess() must be compatible with AdminControllerCore::viewAccess($disable = false) in /home/cockpits/public_html/controllers/admin/AdminLoginController.php on line 27

 

 

the debug is on on my website and its reporting this: 

 

Warning on line 539 in file /home/cockpits/public_html/classes/controller/AdminController.php
[2] count(): Parameter must be an array or an object that implements Countable

Warning on line 1813 in file /home/cockpits/public_html/classes/controller/AdminController.php
[2] Cannot modify header information - headers already sent by (output started at /home/cockpits/public_html/classes/Rijndael.php:68)

Warning on line 3258 in file /home/cockpits/public_html/classes/controller/AdminController.php
[2] count(): Parameter must be an array or an object that implements Countable
 

i was on php 5.6 and everything was working fine, however,  my host company upgraded me to php 7! this is when the issue of the back office stared! 

i am really stuck and hope someone can help.

 

many thanks

Sam. 

Edited October 1, 2018 by Bassam45 (see edit history)

[tuk66]

What is your PS version? The latest 1.6.1.20 is compatible with PHP 7.0. Don't use anything newer (7.1 or 7.2).

[jetx]

Any hosting that doesn't offer multi php should be avoided.

[Linkarta]

On 10/2/2018 at 7:36 PM, tuk66 said:

What is your PS version? The latest 1.6.1.20 is compatible with PHP 7.0. Don't use anything newer (7.1 or 7.2).

this really saved my life, i changed the php version back from 7.3 to 7.0 and back office worked fine