Put the info in your forums' index (where the stats are):
#
#-------------[ 1. Open File ]----------------
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~/index.php
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#-------------[ 2. Find (line: ~156)]----
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$stats['last_user'] = $db->fetch_assoc($result);
#
#-------------[ 3. Add After ]----------------
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$result = $db->query('SELECT SUM(dl_total_bandwidth) FROM '.$db->prefix.'users') or error('Unable to fetch download bandwidth', __FILE__, __LINE__, $db->error());
$stats['total_downloaded'] = $db->result($result);
#
#-------------[ 4. Find (line: ~171)]----
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</dl>
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#-------------[ 5. Add Before ]---------------
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<dd><?php echo 'Total Download Bandwidth: <strong>'.fsize($stats['total_downloaded']); ?></strong></dd>
Put the bandwidth usage for the user under his avatar in topics.
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#-------------[ 1. Open File ]----------------
#
~/viewtopic.php
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#-------------[ 2. Find (line: ~186)]----
#
$result = $db->query('SELECT u.email, u.title, u.url, u.location, u.use_avatar, u.signature, u.email_setting, u.num_posts, u.registered, u.admin_note, p.id, p.poster AS username, p.poster_id, p.poster_ip, p.poster_email, p.message, p.hide_smilies, p.posted, p.edited, p.edited_by, g.g_id, g.g_user_title, o.user_id AS is_online FROM '.$db->prefix.'posts AS p INNER JOIN '.$db->prefix.'users AS u ON u.id=p.poster_id INNER JOIN '.$db->prefix.'groups AS g ON g.g_id=u.group_id LEFT JOIN '.$db->prefix.'online AS o ON (o.user_id=u.id AND o.user_id!=1 AND o.idle=0) WHERE p.topic_id='.$id.' ORDER BY p.id LIMIT '.$start_from.','.$pun_user['disp_posts'], true) or error('Unable to fetch post info', __FILE__, __LINE__, $db->error());
#
#-------------[ 3. Replace With ]--------------
#
$result = $db->query('SELECT u.dl_total_bandwidth, u.email, u.title, u.url, u.location, u.use_avatar, u.signature, u.email_setting, u.num_posts, u.registered, u.admin_note, p.id, p.poster AS username, p.poster_id, p.poster_ip, p.poster_email, p.message, p.hide_smilies, p.posted, p.edited, p.edited_by, g.g_id, g.g_user_title, o.user_id AS is_online FROM '.$db->prefix.'posts AS p INNER JOIN '.$db->prefix.'users AS u ON u.id=p.poster_id INNER JOIN '.$db->prefix.'groups AS g ON g.g_id=u.group_id LEFT JOIN '.$db->prefix.'online AS o ON (o.user_id=u.id AND o.user_id!=1 AND o.idle=0) WHERE p.topic_id='.$id.' ORDER BY p.id LIMIT '.$start_from.','.$pun_user['disp_posts'], true) or error('Unable to fetch post info', __FILE__, __LINE__, $db->error());
#
#-------------[ 4. Find (line: ~321)]----
#
<dd class="postavatar"><?php echo $user_avatar ?></dd>
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#-------------[ 5. Add After ]----------------
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<dd class="usertitle"><strong>DLed: <?php echo pun_htmlspecialchars(fsize($cur_post['dl_total_bandwidth'])); ?></strong></dd>
Put the info in the userlist (with the ability to sort by bandwidth)
#
#-------------[ 1. Open File ]----------------
#
~/userlist.php
#
#-------------[ 2. Find (line: ~46)]----
#
$sort_by = (!isset($_GET['sort_by']) || $_GET['sort_by'] != 'username' && $_GET['sort_by'] != 'registered' && ($_GET['sort_by'] != 'num_posts' || !$show_post_count)) ? 'username' : $_GET['sort_by'];
#
#-------------[ 3. Replace With ]--------------
#
$sort_by = (!isset($_GET['sort_by']) || $_GET['sort_by'] != 'username' && $_GET['sort_by'] != 'registered' && $_GET['sort_by'] != 'dl_total_bandwidth' && ($_GET['sort_by'] != 'num_posts' || !$show_post_count)) ? 'username' : $_GET['sort_by'];
#
#-------------[ 4. Find (line: ~88)]----
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<option value="registered"<?php if ($sort_by == 'registered') echo ' selected="selected"' ?>><?php echo $lang_common['Registered'] ?></option>
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#-------------[ 5. Add Before ]--------------
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<option value="dl_total_bandwidth"<?php if ($sort_by == 'dl_total_bandwidth') echo ' selected="selected"' ?>>Downloaded</option>
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#-------------[ 6. Find (line: ~151)]----
#
</tr>
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#-------------[ 7. Add Before ]---------------
#
<th class="tcr" scope="col">Downloaded</th>
#
#-------------[ 8. Find (line: ~157)]----
#
$result = $db->query('SELECT u.id, u.username, u.title, u.num_posts, u.registered, g.g_id, g.g_user_title FROM '.$db->prefix.'users AS u LEFT JOIN '.$db->prefix.'groups AS g ON g.g_id=u.group_id WHERE u.id>1'.(!empty($where_sql) ? ' AND '.implode(' AND ', $where_sql) : '').' ORDER BY '.$sort_by.' '.$sort_dir.' LIMIT '.$start_from.', 50') or error('Unable to fetch user list', __FILE__, __LINE__, $db->error());
#
#-------------[ 9. Replace With ]--------------
#
$result = $db->query('SELECT u.id, u.username, u.title, u.num_posts, u.registered, g.g_id, g.g_user_title, u.dl_total_bandwidth FROM '.$db->prefix.'users AS u LEFT JOIN '.$db->prefix.'groups AS g ON g.g_id=u.group_id WHERE u.id>1'.(!empty($where_sql) ? ' AND '.implode(' AND ', $where_sql) : '').' ORDER BY '.$sort_by.' '.$sort_dir.' LIMIT '.$start_from.', 50') or error('Unable to fetch user list', __FILE__, __LINE__, $db->error());
* NOTE: , u.dl_total_bandwidth is added after g.g_user_title
#
#-------------[ 10. Find (line: ~171)]----
#
</tr>
#
#-------------[ 11. Add Before ]---------------
#
<td class="tcl"><?php echo fsize($user_data['dl_total_bandwidth']); ?></td>
, should I put it on the project website wiki?