What could be causing this error after successfully installation in XAMPP?

Question

Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in C:\xampp\htdocs\qa\qa-include\qa-db.php on line 556

Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in C:\xampp\htdocs\qa\qa-include\app\format.php on line 1329

Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in C:\xampp\htdocs\qa\qa-include\app\page.php on line 624

Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in C:\xampp\htdocs\qa\qa-include\app\page.php on line 740

Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in C:\xampp\htdocs\qa\qa-include\qa-base.php on line 722

Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in C:\xampp\htdocs\qa\qa-include\qa-theme-base.php on line 310

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Answer 1

Just use my unofficial PHP 8.1 compatible branch. 

Comments

This worked! Thank you.

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Thanks @pupi1985, This works very smoothly.

Answer 2

Thank you for posting this. I also had the same error after installing the Q2A on XAMPP. I look around to see what could be the cause but there was no post on this. I also noticed that the file from Q2A installation page did not install at all on XAMPP, i had to download the  developer file from Github before it even install with the above error. 

Admin can you please look into this.

Comments

Yes, you are right. I had to download it twice,
First from here: https://www.question2answer.org/releases/question2answer-1.8.6.zip (Didn't work at all)

After searching, I found this post: https://github.com/q2a/question2answer/pull/947/files which had a fix.
So, I had to download it from here: https://github.com/q2a/question2answer .
Now, after installing the files I am getting above mentioned details. I believe we need to have a test site running on localhost so that we can work around and customize.

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XAMPP using the newest version of php, and the official version of q2a does not support php V8.0 or 8.1 so you should downgrade the php version in XAMPP or using unofficial PHP 8.1 compatible branch.