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functions.inc.php
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functions.inc.php
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<?php
/**
* LibreNMS
*
* This file is part of LibreNMS
*
* @package librenms
* @subpackage functions
* @author LibreNMS Contributors <librenms-project@google.groups.com>
* @copyright (C) 2006 - 2012 Adam Armstrong (as Observium)
* @copyright (C) 2013 LibreNMS Group
*/
use LibreNMS\Authentication\Auth;
/**
* Compare $t with the value of $vars[$v], if that exists
* @param string $v Name of the var to test
* @param string $t Value to compare $vars[$v] to
* @return boolean true, if values are the same, false if $vars[$v] is unset or values differ
*/
function var_eq($v, $t)
{
global $vars;
if (isset($vars[$v]) && $vars[$v] == $t) {
return true;
}
return false;
}
/**
* Get the value of $vars[$v], if it exists
* @param string $v Name of the var to get
* @return string|boolean The value of $vars[$v] if it exists, false if it does not exist
*/
function var_get($v)
{
global $vars;
if (isset($vars[$v])) {
return $vars[$v];
}
return false;
}
function data_uri($file, $mime)
{
$contents = file_get_contents($file);
$base64 = base64_encode($contents);
return ('data:' . $mime . ';base64,' . $base64);
}//end data_uri()
function nicecase($item)
{
switch ($item) {
case 'dbm':
return 'dBm';
case 'mysql':
return ' MySQL';
case 'powerdns':
return 'PowerDNS';
case 'bind':
return 'BIND';
case 'nfs-stats':
return 'NFS Stats';
case 'nfs-v3-stats':
return 'NFS v3 Stats';
case 'nfs-server':
return 'NFS Server';
case 'ntp':
return 'NTP';
case 'ntp-client':
return 'NTP Client';
case 'ntp-server':
return 'NTP Server';
case 'os-updates':
return 'OS Updates';
case 'powerdns-recursor':
return 'PowerDNS Recursor';
case 'dhcp-stats':
return 'DHCP Stats';
case 'ups-nut':
return 'UPS nut';
case 'ups-apcups':
return 'UPS apcups';
case 'gpsd':
return 'GPSD';
case 'exim-stats':
return 'EXIM Stats';
case 'fbsd-nfs-client':
return 'FreeBSD NFS Client';
case 'fbsd-nfs-server':
return 'FreeBSD NFS Server';
case 'php-fpm':
return 'PHP-FPM';
case 'opengridscheduler':
return 'Open Grid Scheduler';
case 'sdfsinfo':
return 'SDFS info';
case 'pi-hole':
return 'Pi-hole';
case 'freeradius':
return 'FreeRADIUS';
default:
return ucfirst($item);
}
}//end nicecase()
function toner2colour($descr, $percent)
{
$colour = get_percentage_colours(100 - $percent);
if (substr($descr, -1) == 'C' || stripos($descr, 'cyan') !== false) {
$colour['left'] = '55D6D3';
$colour['right'] = '33B4B1';
}
if (substr($descr, -1) == 'M' || stripos($descr, 'magenta') !== false) {
$colour['left'] = 'F24AC8';
$colour['right'] = 'D028A6';
}
if (substr($descr, -1) == 'Y' || stripos($descr, 'yellow') !== false
|| stripos($descr, 'giallo') !== false
|| stripos($descr, 'gul') !== false
) {
$colour['left'] = 'FFF200';
$colour['right'] = 'DDD000';
}
if (substr($descr, -1) == 'K' || stripos($descr, 'black') !== false
|| stripos($descr, 'nero') !== false
) {
$colour['left'] = '000000';
$colour['right'] = '222222';
}
return $colour;
}//end toner2colour()
/**
* Find all links in some text and turn them into html links.
*
* @param string $text
* @return string
*/
function linkify($text)
{
$regex = "/(http|https|ftp|ftps):\/\/[a-z0-9\-.]+\.[a-z]{2,5}(\/\S*)?/i";
return preg_replace($regex, '<a href="$0">$0</a>', $text);
}
function generate_link($text, $vars, $new_vars = array())
{
return '<a href="' . generate_url($vars, $new_vars) . '">' . $text . '</a>';
}//end generate_link()
function generate_url($vars, $new_vars = array())
{
$vars = array_merge($vars, $new_vars);
$url = $vars['page'] . '/';
unset($vars['page']);
foreach ($vars as $var => $value) {
if ($value == '0' || $value != '' && strstr($var, 'opt') === false && is_numeric($var) === false) {
$url .= $var . '=' . urlencode($value) . '/';
}
}
return ($url);
}//end generate_url()
function escape_quotes($text)
{
return str_replace('"', "\'", str_replace("'", "\'", $text));
}//end escape_quotes()
function generate_overlib_content($graph_array, $text)
{
global $config;
$overlib_content = '<div class=overlib><span class=overlib-text>' . $text . '</span><br />';
foreach (array('day', 'week', 'month', 'year') as $period) {
$graph_array['from'] = $config['time'][$period];
$overlib_content .= escape_quotes(generate_graph_tag($graph_array));
}
$overlib_content .= '</div>';
return $overlib_content;
}//end generate_overlib_content()
function get_percentage_colours($percentage, $component_perc_warn = null)
{
$perc_warn = '75';
if (isset($component_perc_warn)) {
$perc_warn = round($component_perc_warn, 0);
}
$background = array();
if ($percentage > $perc_warn) {
$background['left'] = 'c4323f';
$background['right'] = 'C96A73';
} elseif ($percentage > '75') {
$background['left'] = 'bf5d5b';
$background['right'] = 'd39392';
} elseif ($percentage > '50') {
$background['left'] = 'bf875b';
$background['right'] = 'd3ae92';
} elseif ($percentage > '25') {
$background['left'] = '5b93bf';
$background['right'] = '92b7d3';
} else {
$background['left'] = '9abf5b';
$background['right'] = 'bbd392';
}
return ($background);
}//end get_percentage_colours()
function generate_minigraph_image($device, $start, $end, $type, $legend = 'no', $width = 275, $height = 100, $sep = '&', $class = 'minigraph-image', $absolute_size = 0)
{
return '<img class="' . $class . '" width="' . $width . '" height="' . $height . '" src="graph.php?' . implode($sep, array('device=' . $device['device_id'], "from=$start", "to=$end", "width=$width", "height=$height", "type=$type", "legend=$legend", "absolute=$absolute_size")) . '">';
}//end generate_minigraph_image()
function generate_device_url($device, $vars = array())
{
return generate_url(array('page' => 'device', 'device' => $device['device_id']), $vars);
}//end generate_device_url()
function generate_device_link($device, $text = null, $vars = array(), $start = 0, $end = 0, $escape_text = 1, $overlib = 1)
{
global $config;
if (!$start) {
$start = $config['time']['day'];
}
if (!$end) {
$end = $config['time']['now'];
}
$class = devclass($device);
if (!$text) {
$text = $device['hostname'];
}
$text = format_hostname($device, $text);
if ($device['snmp_disable']) {
$graphs = $config['os']['ping']['over'];
} elseif (isset($config['os'][$device['os']]['over'])) {
$graphs = $config['os'][$device['os']]['over'];
} elseif (isset($device['os_group']) && isset($config['os'][$device['os_group']]['over'])) {
$graphs = $config['os'][$device['os_group']]['over'];
} else {
$graphs = $config['os']['default']['over'];
}
$url = generate_device_url($device, $vars);
// beginning of overlib box contains large hostname followed by hardware & OS details
$contents = '<div><span class="list-large">' . $device['hostname'] . '</span>';
if ($device['hardware']) {
$contents .= ' - ' . $device['hardware'];
}
if ($device['os']) {
$contents .= ' - ' . mres($config['os'][$device['os']]['text']);
}
if ($device['version']) {
$contents .= ' ' . mres($device['version']);
}
if ($device['features']) {
$contents .= ' (' . mres($device['features']) . ')';
}
if (isset($device['location'])) {
$contents .= ' - ' . htmlentities($device['location']);
}
$contents .= '</div>';
foreach ($graphs as $entry) {
$graph = $entry['graph'];
$graphhead = $entry['text'];
$contents .= '<div class="overlib-box">';
$contents .= '<span class="overlib-title">' . $graphhead . '</span><br />';
$contents .= generate_minigraph_image($device, $start, $end, $graph);
$contents .= generate_minigraph_image($device, $config['time']['week'], $end, $graph);
$contents .= '</div>';
}
if ($escape_text) {
$text = htmlentities($text);
}
if ($overlib == 0) {
$link = $contents;
} else {
$link = overlib_link($url, $text, escape_quotes($contents), $class);
}
if (device_permitted($device['device_id'])) {
return $link;
} else {
return $device['hostname'];
}
}//end generate_device_link()
function overlib_link($url, $text, $contents, $class = null)
{
global $config;
$contents = "<div style=\'background-color: #FFFFFF;\'>" . $contents . '</div>';
$contents = str_replace('"', "\'", $contents);
if ($class === null) {
$output = '<a href="' . $url . '"';
} else {
$output = '<a class="' . $class . '" href="' . $url . '"';
}
if ($config['web_mouseover'] === false) {
$output .= '>';
} else {
$output .= " onmouseover=\"return overlib('" . $contents . "'" . $config['overlib_defaults'] . ",WRAP,HAUTO,VAUTO); \" onmouseout=\"return nd();\">";
}
$output .= $text . '</a>';
return $output;
}//end overlib_link()
function generate_graph_popup($graph_array)
{
global $config;
// Take $graph_array and print day,week,month,year graps in overlib, hovered over graph
$original_from = $graph_array['from'];
$graph = generate_graph_tag($graph_array);
$content = '<div class=list-large>' . $graph_array['popup_title'] . '</div>';
$content .= "<div style=\'width: 850px\'>";
$graph_array['legend'] = 'yes';
$graph_array['height'] = '100';
$graph_array['width'] = '340';
$graph_array['from'] = $config['time']['day'];
$content .= generate_graph_tag($graph_array);
$graph_array['from'] = $config['time']['week'];
$content .= generate_graph_tag($graph_array);
$graph_array['from'] = $config['time']['month'];
$content .= generate_graph_tag($graph_array);
$graph_array['from'] = $config['time']['year'];
$content .= generate_graph_tag($graph_array);
$content .= '</div>';
$graph_array['from'] = $original_from;
$graph_array['link'] = generate_url($graph_array, array('page' => 'graphs', 'height' => null, 'width' => null, 'bg' => null));
// $graph_array['link'] = "graphs/type=" . $graph_array['type'] . "/id=" . $graph_array['id'];
return overlib_link($graph_array['link'], $graph, $content, null);
}//end generate_graph_popup()
function print_graph_popup($graph_array)
{
echo generate_graph_popup($graph_array);
}//end print_graph_popup()
function permissions_cache($user_id)
{
$permissions = array();
foreach (dbFetchRows("SELECT * FROM devices_perms WHERE user_id = '" . $user_id . "'") as $device) {
$permissions['device'][$device['device_id']] = 1;
}
foreach (dbFetchRows("SELECT * FROM ports_perms WHERE user_id = '" . $user_id . "'") as $port) {
$permissions['port'][$port['port_id']] = 1;
}
foreach (dbFetchRows("SELECT * FROM bill_perms WHERE user_id = '" . $user_id . "'") as $bill) {
$permissions['bill'][$bill['bill_id']] = 1;
}
return $permissions;
}//end permissions_cache()
function bill_permitted($bill_id)
{
global $permissions;
if ($_SESSION['userlevel'] >= '5') {
$allowed = true;
} elseif ($permissions['bill'][$bill_id]) {
$allowed = true;
} else {
$allowed = false;
}
return $allowed;
}//end bill_permitted()
function port_permitted($port_id, $device_id = null)
{
global $permissions;
if (!is_numeric($device_id)) {
$device_id = get_device_id_by_port_id($port_id);
}
if ($_SESSION['userlevel'] >= '5') {
$allowed = true;
} elseif (device_permitted($device_id)) {
$allowed = true;
} elseif ($permissions['port'][$port_id]) {
$allowed = true;
} else {
$allowed = false;
}
return $allowed;
}//end port_permitted()
function application_permitted($app_id, $device_id = null)
{
global $permissions;
if (is_numeric($app_id)) {
if (!$device_id) {
$device_id = get_device_id_by_app_id($app_id);
}
if ($_SESSION['userlevel'] >= '5') {
$allowed = true;
} elseif (device_permitted($device_id)) {
$allowed = true;
} elseif ($permissions['application'][$app_id]) {
$allowed = true;
} else {
$allowed = false;
}
} else {
$allowed = false;
}
return $allowed;
}//end application_permitted()
function device_permitted($device_id)
{
global $permissions;
if ($_SESSION['userlevel'] >= '5') {
$allowed = true;
} elseif ($permissions['device'][$device_id]) {
$allowed = true;
} else {
$allowed = false;
}
return $allowed;
}//end device_permitted()
function print_graph_tag($args)
{
echo generate_graph_tag($args);
}//end print_graph_tag()
function generate_graph_tag($args)
{
$urlargs = array();
foreach ($args as $key => $arg) {
$urlargs[] = $key . '=' . urlencode($arg);
}
return '<img src="graph.php?' . implode('&', $urlargs) . '" border="0" />';
}//end generate_graph_tag()
function generate_lazy_graph_tag($args)
{
global $config;
$urlargs = array();
$w = 0;
$h = 0;
foreach ($args as $key => $arg) {
switch (strtolower($key)) {
case 'width':
$w = $arg;
break;
case 'height':
$h = $arg;
break;
case 'lazy_w':
$lazy_w = $arg;
break;
}
$urlargs[] = $key . "=" . urlencode($arg);
}
if (isset($lazy_w)) {
$w = $lazy_w;
}
if ($config['enable_lazy_load'] === true) {
return '<img class="lazy img-responsive" data-original="graph.php?' . implode('&', $urlargs) . '" border="0" />';
} else {
return '<img class="img-responsive" src="graph.php?' . implode('&', $urlargs) . '" border="0" />';
}
}//end generate_lazy_graph_tag()
function generate_graph_js_state($args)
{
// we are going to assume we know roughly what the graph url looks like here.
// TODO: Add sensible defaults
$from = (is_numeric($args['from']) ? $args['from'] : 0);
$to = (is_numeric($args['to']) ? $args['to'] : 0);
$width = (is_numeric($args['width']) ? $args['width'] : 0);
$height = (is_numeric($args['height']) ? $args['height'] : 0);
$legend = str_replace("'", '', $args['legend']);
$state = <<<STATE
<script type="text/javascript" language="JavaScript">
document.graphFrom = $from;
document.graphTo = $to;
document.graphWidth = $width;
document.graphHeight = $height;
document.graphLegend = '$legend';
</script>
STATE;
return $state;
}//end generate_graph_js_state()
function print_percentage_bar($width, $height, $percent, $left_text, $left_colour, $left_background, $right_text, $right_colour, $right_background)
{
if ($percent > '100') {
$size_percent = '100';
} else {
$size_percent = $percent;
}
$output = '
<div class="container" style="width:' . $width . 'px; height:' . $height . 'px;">
<div class="progress" style="min-width: 2em; background-color:#' . $right_background . '; height:' . $height . 'px;">
<div class="progress-bar" role="progressbar" aria-valuenow="' . $size_percent . '" aria-valuemin="0" aria-valuemax="100" style="min-width: 2em; width:' . $size_percent . '%; background-color: #' . $left_background . ';">
</div>
</div>
<b class="pull-left" style="padding-left: 4px; height: ' . $height . 'px;margin-top:-' . ($height * 2) . 'px; color:#' . $left_colour . ';">' . $left_text . '</b>
<b class="pull-right" style="padding-right: 4px; height: ' . $height . 'px;margin-top:-' . ($height * 2) . 'px; color:#' . $right_colour . ';">' . $right_text . '</b>
</div>
';
return $output;
}//end print_percentage_bar()
function generate_entity_link($type, $entity, $text = null, $graph_type = null)
{
global $config, $entity_cache;
if (is_numeric($entity)) {
$entity = get_entity_by_id_cache($type, $entity);
}
switch ($type) {
case 'port':
$link = generate_port_link($entity, $text, $graph_type);
break;
case 'storage':
if (empty($text)) {
$text = $entity['storage_descr'];
}
$link = generate_link($text, array('page' => 'device', 'device' => $entity['device_id'], 'tab' => 'health', 'metric' => 'storage'));
break;
default:
$link = $entity[$type . '_id'];
}
return ($link);
}//end generate_entity_link()
function generate_port_link($port, $text = null, $type = null, $overlib = 1, $single_graph = 0)
{
global $config;
$graph_array = array();
if (!$text) {
$text = fixifName($port['label']);
}
if ($type) {
$port['graph_type'] = $type;
}
if (!isset($port['graph_type'])) {
$port['graph_type'] = 'port_bits';
}
$class = ifclass($port['ifOperStatus'], $port['ifAdminStatus']);
if (!isset($port['hostname'])) {
$port = array_merge($port, device_by_id_cache($port['device_id']));
}
$content = '<div class=list-large>' . $port['hostname'] . ' - ' . fixifName(addslashes(display($port['label']))) . '</div>';
if ($port['ifAlias']) {
$content .= addslashes(display($port['ifAlias'])) . '<br />';
}
$content .= "<div style=\'width: 850px\'>";
$graph_array['type'] = $port['graph_type'];
$graph_array['legend'] = 'yes';
$graph_array['height'] = '100';
$graph_array['width'] = '340';
$graph_array['to'] = $config['time']['now'];
$graph_array['from'] = $config['time']['day'];
$graph_array['id'] = $port['port_id'];
$content .= generate_graph_tag($graph_array);
if ($single_graph == 0) {
$graph_array['from'] = $config['time']['week'];
$content .= generate_graph_tag($graph_array);
$graph_array['from'] = $config['time']['month'];
$content .= generate_graph_tag($graph_array);
$graph_array['from'] = $config['time']['year'];
$content .= generate_graph_tag($graph_array);
}
$content .= '</div>';
$url = generate_port_url($port);
if ($overlib == 0) {
return $content;
} elseif (port_permitted($port['port_id'], $port['device_id'])) {
return overlib_link($url, $text, $content, $class);
} else {
return fixifName($text);
}
}//end generate_port_link()
function generate_port_url($port, $vars = array())
{
return generate_url(array('page' => 'device', 'device' => $port['device_id'], 'tab' => 'port', 'port' => $port['port_id']), $vars);
}//end generate_port_url()
function generate_peer_url($peer, $vars = array())
{
return generate_url(array('page' => 'device', 'device' => $peer['device_id'], 'tab' => 'routing', 'proto' => 'bgp'), $vars);
}//end generate_peer_url()
function generate_bill_url($bill, $vars = array())
{
return generate_url(array('page' => 'bill', 'bill_id' => $bill['bill_id']), $vars);
}//end generate_bill_url()
function generate_port_image($args)
{
if (!$args['bg']) {
$args['bg'] = 'FFFFFF00';
}
return "<img src='graph.php?type=" . $args['graph_type'] . '&id=' . $args['port_id'] . '&from=' . $args['from'] . '&to=' . $args['to'] . '&width=' . $args['width'] . '&height=' . $args['height'] . '&bg=' . $args['bg'] . "'>";
}//end generate_port_image()
function generate_port_thumbnail($port)
{
global $config;
$port['graph_type'] = 'port_bits';
$port['from'] = $config['time']['day'];
$port['to'] = $config['time']['now'];
$port['width'] = 150;
$port['height'] = 21;
return generate_port_image($port);
}//end generate_port_thumbnail()
function print_port_thumbnail($args)
{
echo generate_port_link($args, generate_port_image($args));
}//end print_port_thumbnail()
function print_optionbar_start($height = 0, $width = 0, $marginbottom = 5)
{
echo '
<div class="well well-sm">
';
}//end print_optionbar_start()
function print_optionbar_end()
{
echo ' </div>';
}//end print_optionbar_end()
function overlibprint($text)
{
return "onmouseover=\"return overlib('" . $text . "');\" onmouseout=\"return nd();\"";
}//end overlibprint()
function humanmedia($media)
{
global $rewrite_iftype;
array_preg_replace($rewrite_iftype, $media);
return $media;
}//end humanmedia()
function humanspeed($speed)
{
$speed = formatRates($speed);
if ($speed == '') {
$speed = '-';
}
return $speed;
}//end humanspeed()
function devclass($device)
{
if (isset($device['status']) && $device['status'] == '0') {
$class = 'list-device-down';
} else {
$class = 'list-device';
}
if (isset($device['ignore']) && $device['ignore'] == '1') {
$class = 'list-device-ignored';
if (isset($device['status']) && $device['status'] == '1') {
$class = 'list-device-ignored-up';
}
}
if (isset($device['disabled']) && $device['disabled'] == '1') {
$class = 'list-device-disabled';
}
return $class;
}//end devclass()
function getlocations()
{
$locations = array();
// Fetch regular locations
if ($_SESSION['userlevel'] >= '5') {
$rows = dbFetchRows('SELECT location FROM devices AS D GROUP BY location ORDER BY location');
} else {
$rows = dbFetchRows('SELECT location FROM devices AS D, devices_perms AS P WHERE D.device_id = P.device_id AND P.user_id = ? GROUP BY location ORDER BY location', array($_SESSION['user_id']));
}
foreach ($rows as $row) {
// Only add it as a location if it wasn't overridden (and not already there)
if ($row['location'] != '') {
if (!in_array($row['location'], $locations)) {
$locations[] = $row['location'];
}
}
}
sort($locations);
return $locations;
}//end getlocations()
function foldersize($path)
{
$total_size = 0;
$files = scandir($path);
$total_files = 0;
foreach ($files as $t) {
if (is_dir(rtrim($path, '/') . '/' . $t)) {
if ($t <> '.' && $t <> '..') {
$size = foldersize(rtrim($path, '/') . '/' . $t);
$total_size += $size;
}
} else {
$size = filesize(rtrim($path, '/') . '/' . $t);
$total_size += $size;
$total_files++;
}
}
return array(
$total_size,
$total_files,
);
}//end foldersize()
function generate_ap_link($args, $text = null, $type = null)
{
global $config;
$args = cleanPort($args);
if (!$text) {
$text = fixIfName($args['label']);
}
if ($type) {
$args['graph_type'] = $type;
}
if (!isset($args['graph_type'])) {
$args['graph_type'] = 'port_bits';
}
if (!isset($args['hostname'])) {
$args = array_merge($args, device_by_id_cache($args['device_id']));
}
$content = '<div class=list-large>' . $args['text'] . ' - ' . fixifName($args['label']) . '</div>';
if ($args['ifAlias']) {
$content .= display($args['ifAlias']) . '<br />';
}
$content .= "<div style=\'width: 850px\'>";
$graph_array = array();
$graph_array['type'] = $args['graph_type'];
$graph_array['legend'] = 'yes';
$graph_array['height'] = '100';
$graph_array['width'] = '340';
$graph_array['to'] = $config['time']['now'];
$graph_array['from'] = $config['time']['day'];
$graph_array['id'] = $args['accesspoint_id'];
$content .= generate_graph_tag($graph_array);
$graph_array['from'] = $config['time']['week'];
$content .= generate_graph_tag($graph_array);
$graph_array['from'] = $config['time']['month'];
$content .= generate_graph_tag($graph_array);
$graph_array['from'] = $config['time']['year'];
$content .= generate_graph_tag($graph_array);
$content .= '</div>';
$url = generate_ap_url($args);
if (port_permitted($args['interface_id'], $args['device_id'])) {
return overlib_link($url, $text, $content, null);
} else {
return fixifName($text);
}
}//end generate_ap_link()
function generate_ap_url($ap, $vars = array())
{
return generate_url(array('page' => 'device', 'device' => $ap['device_id'], 'tab' => 'accesspoint', 'ap' => $ap['accesspoint_id']), $vars);
}//end generate_ap_url()
function report_this_text($message)
{
global $config;
return $message . '\nPlease report this to the ' . $config['project_name'] . ' developers at ' . $config['project_issues'] . '\n';
}//end report_this_text()
// Find all the files in the given directory that match the pattern
function get_matching_files($dir, $match = '/\.php$/')
{
global $config;
$list = array();
if ($handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
if ($file != '.' && $file != '..' && preg_match($match, $file) === 1) {
$list[] = $file;
}
}
closedir($handle);
}
return $list;
}//end get_matching_files()
// Include all the files in the given directory that match the pattern
function include_matching_files($dir, $match = '/\.php$/')
{
foreach (get_matching_files($dir, $match) as $file) {
include_once $file;
}
}//end include_matching_files()
function generate_pagination($count, $limit, $page, $links = 2)
{
$end_page = ceil($count / $limit);
$start = (($page - $links) > 0) ? ($page - $links) : 1;
$end = (($page + $links) < $end_page) ? ($page + $links) : $end_page;
$return = '<ul class="pagination">';
$link_class = ($page == 1) ? 'disabled' : '';
$return .= "<li><a href='' onClick='changePage(1,event);'>«</a></li>";
$return .= "<li class='$link_class'><a href='' onClick='changePage($page - 1,event);'><</a></li>";
if ($start > 1) {
$return .= "<li><a href='' onClick='changePage(1,event);'>1</a></li>";
$return .= "<li class='disabled'><span>...</span></li>";
}
for ($x = $start; $x <= $end; $x++) {
$link_class = ($page == $x) ? 'active' : '';
$return .= "<li class='$link_class'><a href='' onClick='changePage($x,event);'>$x </a></li>";
}
if ($end < $end_page) {
$return .= "<li class='disabled'><span>...</span></li>";
$return .= "<li><a href='' onClick='changePage($end_page,event);'>$end_page</a></li>";
}
$link_class = ($page == $end_page) ? 'disabled' : '';
$return .= "<li class='$link_class'><a href='' onClick='changePage($page + 1,event);'>></a></li>";
$return .= "<li class='$link_class'><a href='' onClick='changePage($end_page,event);'>»</a></li>";
$return .= '</ul>';
return ($return);
}//end generate_pagination()
function is_admin()
{
if ($_SESSION['userlevel'] >= '10') {
$allowed = true;
} else {
$allowed = false;
}
return $allowed;