Disable HTML in WordPress comments

 disable HTML in WordPress comments

WordPress allows some HTML tags like <a>, <em>, <strong> within comment text. But if you would like to disable this feature on your blog to prevent users from adding any HTML content within comment text, add this function to your theme’s functions.php file. This will treat the HTML content within comment text as literals and display them as it is.

// 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( "'", '&apos;', $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( '&apos;', "'", $comment_to_display );

return $comment_to_display;
}

add_filter( 'preprocess_comment', 'plc_comment_post', '', 1);
add_filter( 'comment_text', 'plc_comment_display', '', 1);
add_filter( 'comment_text_rss', 'plc_comment_display', '', 1);
add_filter( 'comment_excerpt', 'plc_comment_display', '', 1);

Source


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