Question

How to lock the question for accepting new answers after selection of best answer by user or moderator?

does this require lots of code changes?

Answer 1

This is fairly easy to do - add the following line before the end of the branch:

if (isset($question)) { ... }

at the end of qa_page_q_load_q() in qa-page-question.php:

$question['answerable']=$question['answerable'] && !isset($question['selchildid']);

The && is a logical AND so we're just adding another condition here on whether a question can be answered - the condition is that it has no selected answer.

Comments

$question['commentable']=$question['commentable'] && !isset($question['selchildid']);

this line still allows comments on best answer.

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Gideon, How to fix this issue? thanks!
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 $question['commentable']=$question['commentable'] && !isset($question['selchildid']);

this line still allows comments on best answer.

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It's the same idea - inside this loop:

foreach ($answers as $key => $answer) { ... }

Insert the code:

$answers[$key]['commentable']=$answer['commentable'] && !isset($question['selchildid']);

I'm assuming here you want to prevent comments on all the answers.

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yes, once best answer is selected then disable comments on all answers and question. only "ask related question" link should be there.

I guess this should fix the issue.