<?php
/*
Plugin Name: Force Valid Email in Comments
Version: 1.0
Plugin URI:
Description: This simple function is run when comments are being submitted, and uses a built-in WordPress function to ensure that commenters' e-mail addresses are at lead validly formed. It only does this check if you have WordPress set to require name and e-mail.
Author: Mark Jaquith
Author URI: http://www.txfx.net/
*/
function force_valid_comment_email($comment){
global $email;
if ( get_settings('require_name_email') && !is_email($email))
die( __('The email address you entered was invalid.') );
return $comment;
}
add_action('post_comment_text', 'force_valid_comment_email', 1);
?>

One thing to note: it only performs the check if you have WordPress set to require name and email. If you don't require an email address, what do you care if it is validated? Then again, if you do want it to check regardless, just change the conditional statement to this:

if (!is_email($email))

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Warning: This is not just a plugin. You are going to add a few lines to a core WordPress file. Just so you know.

2 files need to be modified: wp-comments.php (to put in the checkbox for "don't remember my info" and the "delete my cookie" link), and wp-comments-post.php (to ensure that the cookie isn't saved if the user requests that it not be), and you need to install a plugin to handle manual "delete my cookie" requests. (Just a side note, and this applies to anytime you need to modify an existing page, you should make backups of the wp-comments.php, and wp-comments-post.php page before you make your changes)

Step 1

Open up wp-comments-post.php and find these lines (89, 90 and 91):

setcookie('comment_author_' . $cookiehash, $author, time() + 30000000, COOKIEPATH);
setcookie('comment_author_email_' . $cookiehash, $email, time() + 30000000, COOKIEPATH);
setcookie('comment_author_url_' . $cookiehash, $url, time() + 30000000, COOKIEPATH);

Change those lines to the following:

if($_POST['forget_cookie'] == 'forget'){
setcookie('comment_author_' . $cookiehash, ", time()-60000, COOKIEPATH);
setcookie('comment_author_email_' . $cookiehash, ", time()-60000, COOKIEPATH);
setcookie('comment_author_url_' . $cookiehash, ", time()-60000, COOKIEPATH);
} else {
setcookie('comment_author_' . $cookiehash, $author, time() + 30000000, COOKIEPATH);
setcookie('comment_author_email_' . $cookiehash, $email, time() + 30000000, COOKIEPATH);
setcookie('comment_author_url_' . $cookiehash, $url, time() + 30000000, COOKIEPATH);
}

Save wp-comments-post.php and upload the new version.

Step 2

Add the following code to your my-hacks.php.

/*
Code Reference Name: Forget User Info
URI: http://www.scriptygoddess.com/archives/2004/06/29/forget-user-info/
Description: Deletes the comment cookie when ?forget_user_info=1 is passed to the URL
Version: 1.0
Author: Mark Jaquith
Author URI: http://www.txfx.net/
*/
if($_GET['forget_user_info']) { // User has manually requested that their cookie be deleted.
setcookie('comment_author_' . $cookiehash, ", time()-60000, COOKIEPATH); setcookie('comment_author_email_' . $cookiehash, ", time()-60000, COOKIEPATH); setcookie('comment_author_url_' . $cookiehash, ", time()-60000, COOKIEPATH);
unset($comment_author, $comment_author_email, $comment_author_url);
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
header('Cache-Control: no-cache, must-revalidate');
header('Pragma: no-cache');
$location = $_SERVER["HTTP_REFERER"];
if ($is_IIS) {
header("Refresh: 0;url=$location");
} else {
header("Location: $location");
}
}

Step 3

Open up wp-comments.php.

Add this line, somewhere in the form section:
(You should also probably give the input a tabindex, and reorder any other input tabindexes that follow, so that your users don't become human pinballs when they press TAB to go to the next form element.)

<p>
<input type="checkbox" name="forget_cookie" id="forget_cookie" value="forget" />
<label for="forget_cookie">Do not save my info</label>
</p>

Add this line where you think it would be appropriate:

<?php if (strlen($comment_author) != 0 || strlen($comment_author_email) != 0 || strlen($comment_author_url) != 0) { echo '<p>Your info has been saved, but you may <a href="' . $_SERVER['REQUEST_URI'] . '?forget_user_info=1">delete your cookie</a> if you wish.</p>'; } ?>

Save your changes to wp-comments.php, upload the new version, and you're done!

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This function would go in your my-hacks.php file. I created it quickly for my own uses – wanted to keep it here for "code storage" – but you will probably want to customize the code so that it does what you want it to.

function displayRecentlyUpdatedPosts () {
global $wpdb, $tableposts;
$now = current_time('mysql');
$arcresults = $wpdb->get_results("SELECT ID, post_date, post_title, post_modified FROM $tableposts WHERE post_modified < '$now' AND post_status = 'publish' AND post_modified != post_date ORDER BY post_modified DESC LIMIT 20");
if ($arcresults) {
foreach ($arcresults as $arcresult) {
if ($arcresult->post_date != '0000-00-00 00:00:00') {
$url = get_permalink($arcresult->ID);
$arc_title = stripslashes($arcresult->post_title);
if ($arc_title) {
$text = strip_tags($arc_title);
} else {
$text = $arcresult->ID;
}
$post_date = substr($arcresult->post_modified, 0, 10);
$post_day = substr($arcresult->post_modified, 8, 2);
$post_year = substr($arcresult->post_modified, 0, 4);
$post_month = substr($arcresult->post_modified, 5, 2);
$post_hour = substr($arcresult->post_modified, 11, 2);
$post_min = substr($arcresult->post_modified, 14, 2);
$post_sec = substr($arcresult->post_modified, 17, 2);
$amPm = "am";
if ($post_hour > 12) {
$post_hour = $post_hour – 12;
$amPm = "pm";
}
echo "<p>".$post_month.".".$post_day.".".$post_year." ".$post_hour.":".$post_min." ".$amPm."<br /><a href="".$url."">".$text."</a></p>";
}
}
}
}

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Again – I made this function specifically for a personal use – so there's not a lot of 'easy customization' without specifically editing the code, so I apologize for the lack of ease-of-use – but I wanted to post this for my own "code storage".

Here's the function:

function displayAllPostsGrouped () {
global $wpdb, $tableposts;
$now = current_time('mysql');
$previousPostDate = ";
$firstrun = true;
$arcresults = $wpdb->get_results("SELECT ID, post_date, post_title FROM $tableposts WHERE post_date < '$now' AND post_status = 'publish' ORDER BY post_date DESC");
if ($arcresults) {
foreach ($arcresults as $arcresult) {
if ($arcresult->post_date != '0000-00-00 00:00:00') {
$url = get_permalink($arcresult->ID);
$arc_title = stripslashes($arcresult->post_title);
if ($arc_title) {
$text = strip_tags($arc_title);
} else {
$text = $arcresult->ID;
}
$post_date = substr($arcresult->post_date, 0, 10);
$post_day = substr($arcresult->post_date, 8, 2);
$post_year = substr($arcresult->post_date, 0, 4);
$post_month = substr($arcresult->post_date, 5, 2);
if ($previousPostDate != $post_date) {
if (!$firstrun) {
echo "</p>";
}
echo "<p><b>".$post_month.".".$post_day.".".$post_year."</b><br />";
}
echo "<a href='".$url."'>".$text."</a><br />";
$previousPostDate = $post_date;
}
}
}
}

Post last updated: 6/22/04 9:18pm

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Ok, I'll get off the soapbox now. Greg asked me how I separated the comments and trackbacks on this site. Here's how:

Add the following function to your my-hacks.php file (See more information on how to use my-hacks.php here – link via Carthik) :

function return_comment_type($commenttxt = 'Comment', $trackbacktxt = 'Trackback', $pingbacktxt = 'Pingback') {
global $comment;
if (preg_match('|<trackback />|', $comment->comment_content))
return $trackbacktxt;
elseif (preg_match('|<pingback />|', $comment->comment_content))
return $pingbacktxt;
else
return $commenttxt;
}

And here's how you'll use it…

In wp-comments.php – this is what I have (edit for your own use as neccessary)

<?php if ($comments) { ?>
<?php
$cmts = 0;
$trkbks = 0;
?>
<p><b>:: Trackbacks/Pingbacks :: </b></p>
<ol>
<?php foreach ($comments as $comment) { ?>
<?php if (return_comment_type() != "Comment") { ?>
<?php $trkbks++; ?>
<a name="comment-<?php comment_ID() ?>"></a>
<li><?php comment_text() ?>
<p><?php comment_type(); ?> <?php _e("by"); ?> <?php comment_author_link() ?> — <?php comment_date() ?> <?php comment_time() ?> | <a href="#comment-<?php comment_ID() ?>">permalink</a></cite> <?php edit_comment_link(__("Edit This"), ' |'); ?></p>
<br />
</li>
<?php } ?>
<?php } // end for each comment ?>
</ol>
<?php if($trkbks <= 0) { ?>
<p>No Trackbacks/Pingbacks</p>
<?php } ?>
<p><b>:: Comments :: </b></p>
<ol>
<?php foreach ($comments as $comment) { ?>
<?php if (return_comment_type() == "Comment") { ?>
<?php $cmts++; ?>
<a name="comment-<?php comment_ID() ?>"></a>
<?php
// this is actually the "important" comment highlightling
$isImportant = false;
if (stristr($comment->comment_content, "<!–important–>")) {
$isImportant = true;
} ?>
<li>
<?php if($isImportant) { echo '<div class="importantcomment">';} ?>
<?php comment_text() ?>
<p><?php comment_type(); ?> <?php _e("by"); ?> <?php comment_author_link() ?> — <?php comment_date() ?> <?php comment_time() ?> | <a href="#comment-<?php comment_ID() ?>">permalink</a> <?php edit_comment_link(__("Edit This"), ' |'); ?></p>
<?php if($isImportant) { echo '</div>';} ?>
<br />
</li>
<?php } ?>
<?php } // end for each comment ?>
</ol>
<?php if($cmts <= 0) { ?>
<p>No comments</p>
<?php } ?>
<?php } else { // this is displayed if there are no comments so far ?>
<p><?php _e("No comments yet."); ?></p>
<?php } ?>

I should add that I'm not making any guarantees that this code will validate – feel free to edit for your own purpose.

(Updated to add: I'll probably want to combine this with this plugin I just found (via WxGal) which will give you a separate count for trackbacks and comments)

Post last updated: 6/22/04 9:27pm

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