Disable HTML in WordPress Comments


Did you ever see in your SPAM folder, how many comments have tons of HTML codes which is basically links. That is how most spammers add links. But you can disable HTML in WordPress Comments to be functional. So if someone uses the strong code, it will not bold the text etc.

All you have to do is simply open your functions.php and add the following code:

// This will occur when the comment is posted
function plc_comment_post( $incoming_comment ) {

// convert everything in a comment to display literally
$incoming_comment['comment_content'] = htmlspecialchars($incoming_comment['comment_content']);

// the one exception is single quotes, which cannot be #039; because WordPress marks it as spam
$incoming_comment['comment_content'] = str_replace( "'", ''', $incoming_comment['comment_content'] );

return( $incoming_comment );
}

// This will occur before a comment is displayed
function plc_comment_display( $comment_to_display ) {

// Put the single quotes back in
$comment_to_display = str_replace( ''', "'", $comment_to_display );

return $comment_to_display;

Source – The original author also offers a plugin that you can download from his site.

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