Support » Fixing WordPress » Automatically adding text to comment after comment is submitted

  • Resolved nemo-maritime


    I was wondering how I can add text to a comment after it has been submitted. Kind of like a signature. What I want is to have the comment field look normal when someone is posting, and have the text field empty at first. Then after they post the comment, a block of text would be automatically added a paragraph or two below their comment, but in their comment area. If that makes sense. So have the comment field empty when someone is typing, and after they submit their comment, a block of text gets added a line or two below their comment text, but still in the same comment.

Viewing 15 replies - 31 through 45 (of 60 total)
  • Ok, had a little bit of time to hash out a basic structure. Here’s what I have so far (with most of the credit to t31os). I used the strategy in that link you gave, t31os.

    Currently this simply tests to see if a comment is made from a Mozilla agent, and if not it appends “Not…Mozilla…” to the end of the comment.

    I’ve still got to finish the coding and make it more efficient, but what do you guys think so far? Tips and criticisms welcomed.

    add_filter( 'comment_text', 'mobilesig' ); 
    function mobilesig ($mytext) {
    global $comment;
    $is_mobile = false;
    $str_comment_agent = strtolower($comment->comment_agent);
    		$is_mobile = strpos($str_comment_agent, 'moz') !== false;
    		if (!$is_mobile) {
    			$mytext = get_comment_text( $comment ) . '<p style="border-top: 1px solid #0C14F0; margin: 30px 0 0 0; padding: 2px 0 0 0;"><small>Not Posted From a Mozilla Agent!</small>';
    			return $mytext;
    		else {
    			return $mytext = get_comment_text($comment);

    It’s short and simple… 🙂

    You can do this directly in the theme functions if you use a comments callback, i’ll give an example…

    In theme comments.php
    <?php wp_list_comments('type=comment&amp;callback=mytheme_comment'); ?>
    Functions file

    function mytheme_comment($comment, $args, $depth) {
       $GLOBALS['comment'] = $comment; ?>
       <li <?php comment_class(); ?> id="li-comment-<?php comment_ID() ?>">
         <div id="comment-<?php comment_ID(); ?>">
          <div class="comment-author vcard">
             <?php echo get_avatar($comment,$size='48',$default='<path_to_url>' ); ?>
             <?php printf(__('<cite class="fn">%s</cite> <span class="says">says:</span>'), get_comment_author_link()) ?>
          <?php if ($comment->comment_approved == '0') : ?>
             <em><?php _e('Your comment is awaiting moderation.') ?></em>
             <br />
          <?php endif; ?>
          <div class="comment-meta commentmetadata"><a href="<?php echo htmlspecialchars( get_comment_link( $comment->comment_ID ) ) ?>"><?php printf(__('%1$s at %2$s'), get_comment_date(),  get_comment_time()) ?></a><?php edit_comment_link(__('(Edit)'),'  ','') ?></div>
          <?php comment_text() ?>
          // Do your stuff here...
          <div class="reply">
             <?php comment_reply_link(array_merge( $args, array('depth' => $depth, 'max_depth' => $args['max_depth']))) ?>

    Of course this restricts the code to the theme, rather then working at a plugin level…

    I’m not sure it matters hugely though… but that’s how i did when i was testing the comment_agent… it seemed easiest…

    Though in theory you’re not running each comment through an additional filter, and i’d expect overall load times to be faster in this case…

    Could do with the OP offering some input at this point i think… 🙂

    My theme has the comment callback, so I guess I got lucky when testing. I’m not clear on why the callback is required for the filter to work on wp_list_comments() though. (I guess the other way to list comments would be a regular comments loop?)

    Maybe I’ll throw this all in a plugin with a short options screen just for practice. Never written one before.

    You need the callback because otherwise there is no way to add anything into the comments loop without running the comments through a filter…

    wp_list_comments() is that loop so to speak…

    You don’t need the filter if you plonk your code it in the comment loop/callback…

    My point simply being, this can be done at a theme level without any additional filters.

    Ahhh, I see. I never even considered not putting it in the theme’s functions.php file. I forgot I could have also just stuck the code in the comment loop.

    That’s what I get for jumping into WordPress coding at the filter level. Now I can’t do anything but write filters. 😉

    By the way thanks for the help on this, it’s been a pretty good learning experience. I’ll have to finish the code up this weekend to make it a working filter.

    Well as soon as i knew the comments table had a field for the user agent the first thing i did was ask myself how comments are looped…

    The theme i use has wp_list_comments, so i hit the codex and created a custom callback, it was then a matter of guessing/assuming how to call that field…

    In this case..

    I assumed $comment was an object which is the result from the comments table, so then i reference the necessary field, that being “comment_agent”..

    Testing locally means i can run any code without fear of opening a gaping security hole…

    So while testing i do alot of…

    print '<pre>';
    print '</pre>';


    print '<pre>';
    print '</pre>';

    Also turn on full error reporting and notices…

    I also have this little function for printing out handy info..

    function variable_array_dump($var_name, $var_array) {
    	if (is_array($var_array)) {
    		$output = "
    	<table width='100%'>
    			<td width='20%'><b>" . $var_name . "</b></td>
    		foreach ($var_array as $key => $value) {
    			$value = variable_array_dump($key, $value);
    			$output .= "
          $output .= "
    	return $output;
    	else {
    		return strval($var_array);
    //echo variable_array_dump('SOMENAME', $_SERVER);

    The commented bit is an example, in this case i get a print out of what’s been stored in $_SERVER, but you can use, $_POST, $_GET, or just about anything else… (It’s not 100% perfect, but it works for most things – grabbed it off google)…

    It definately helps to know what variables and requests are being made on each page load, especially if you’re working on a plugin or function… though for most things a var_dump or print_r is sufficient..

    Nice. I’m totally snagging that function. Right now I’ve just been testing on my live site. Horrible idea, I know, but I haven’t set anything up locally yet.

    If I’m able to make this into a little practice plugin I’ll give it to you guys for testing/tearing apart. 🙂

    I’ll have a small plugin ready later tonight. Mostly used as coding and plugin writing practice, but perhaps it’s useful as well.

    Either of you willing to help me test it? I have no mobile phone to post from. The best I’ve been able to do is fake a mobile comment using a variable, but it’s not exactly real-world testing.

    And t31os, if you have time I wouldn’t mind you just taking a look at it anyway. Then you can warn me of the dire security risk I’ve opened up on all of the plugin’s users. 😉

    Be happy to test it… i’m still learning the plugin stuff myself, curious to see how you approach it…

    I’m sure there’s an easy way to spoof the user agent for the sake of testing, just have to spend a few mins on google…

    Zip it up and post a link when you’re ready….. 🙂

    Can always revise, so don’t worry about having everything perfect.. 🙂

    Warning to anyone not following the thread. The following links to a plugin that’s only lightly tested. Use at your own risk for now.

    Ok t31os, here’s the link to download the zip.

    Any/all criticism, tips, etc. welcomed. The most interested part so far has actually been creating the options page. Still planning a checkbox to turn on/off the comment text, only have the variable to control it so for, haven’t coded it to the options page.

    Have various other ideas bouncing around my head but let me know what ya’ think.

    P.S. – I’m actually working backward here. My coding experience is basically a year and a half of CS courses a bunch of years ago (none in PHP), so I’m pretty much just diving in and learning/refreshing my memory as I go.

    Consequently I’m actually hoping for tips and enlightenment. So don’t hesitate to tear the code apart and recommend stuff.

    Looks decent enough mate.

    Few minor HTML errors, here and there (block level elements inside inline elements), but apart from that it looks suited…

    I’d fiddling with a few bits and have added a few minor bits for you, i’ll plonk it up in a pastebin when i’ve finished fiddling… since it’s only a single file…

    I plonked it in a folder when installing it, i’m not a fan of plugins sitting in the root of the plugin folder, prefer that they each have their own folder, but that’s a personal preference..

    Will post back later once i’ve got some other things done… 🙂 Nice work…

    Nice, interested to see what ya’ added. Play with it all you want and I’ll pick through your code and comments to see how it works. 🙂

    Ok, here we go…

    Removed a few un-necessary bits, and added a few extra bits..

    Importantly though, your section for..add_options_page

    Should have been set to more than 1, since this sets the user_level able to access the page… i typically go for 8….

    We could proberly do away with your additional bits relating to user_level but i left them and focussed on other bits..

    You could add some session and token bits in, but it’s really not necessary for something so basic…

    Ideally the variable that’s passed along to update_option() should have some sanitization done before being sent along (because you’re placing user input into the database with this function), but again for something this simple it may be a little overcautious….

    Primarily i’ve updated the preview area to look more like an actual comment (ok not perfect, but a little more comment-like)… and updated the html and css… the rest was me just playing around … 🙂

    Do with it as you will…. it’s your code now.. 😉 …

Viewing 15 replies - 31 through 45 (of 60 total)
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