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<?php
if (variable_get("referer", 0)) {
if ($referer = getenv("HTTP_REFERER")) {
db_query("INSERT INTO referer (URL, timestamp) values ('". check_input($referer) ."', '". time() ."')");
}
}
function statistics_cron() {
db_query("DELETE FROM referer WHERE ". time() ." - timestamp > ". variable_get("referer_clear", 604800));
}
function statistics_perm() {
return array("access statistics");
}
function statistics_conf_options() {
$period = array(3600 => format_interval(3600), 10800 => format_interval(10800), 21600 => format_interval(21600), 32400 => format_interval(32400), 43200 => format_interval(43200), 86400 => format_interval(86400), 172800 => format_interval(172800), 259200 => format_interval(259200), 604800 => format_interval(604800), 1209600 => format_interval(1209600), 2419200 => format_interval(2419200), 1000000000 => t("Never"));
$output .= form_select(t("Track referers"), "referer", variable_get("referer", 0), array("Disabled", "Enabled"), "If enabled, Drupal will count how many times your website is referred to by other websites.");
$output .= form_select(t("Discard referers older than"), "referer_clear", variable_get("referer_clear", 604800), $period, "The time referer entries should be kept. Older entries will be automatically discarded. Requires crontab."); return $output;
}
function statistics_referer() {
$result = db_query("SELECT url, COUNT(url) AS count FROM referer WHERE url NOT LIKE '". path_uri() ."%' GROUP BY url ORDER BY count DESC");
$output .= "<P>Referers of the last ". format_interval(variable_get("referer_clear", 604800)) .":</P>\n";
$output .= "<H3>External referers</H3>\n";
$output .= "<TABLE BORDER=\"1\" CELLPADDING=\"3\" CELLSPACING=\"0\">\n";
$output .= " <TR><TH>URL</TH><TH>number</TH></TR>\n";
while ($referer = db_fetch_object($result)) {
$output .= "<TR><TD><A HREF=\"". check_output($referer->url) ."\">". substr(check_output($referer->url), 0, 100) ."</A></TD><TD>". check_output($referer->count) ."</TD></TR>";
}
$output .= "</TABLE>\n";
$result = db_query("SELECT url, COUNT(url) AS count FROM referer WHERE url LIKE '". path_uri() ."%' GROUP BY url ORDER BY count DESC");
$output .= "<H3>Internal referers</H3>\n";
$output .= "<TABLE BORDER=\"1\" CELLPADDING=\"3\" CELLSPACING=\"0\">\n";
$output .= " <TR><TH>URL</TH><TH>number</TH></TR>\n";
while ($referer = db_fetch_object($result)) {
$output .= "<TR><TD><A HREF=\"". check_output($referer->url) ."\">". substr(check_output($referer->url), 0, 100) ."</A></TD><TD>". check_output($referer->count) ."</TD></TR>";
}
$output .= "</TABLE>\n";
return $output;
}
function statistics_admin() {
global $user;
if (user_access($user, "access statistics")) {
print statistics_referer();
}
}
?>
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