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<?php // $Id$
/// This script looks through all the module directories for cron.php files
/// and runs them. These files can contain cleanup functions, email functions
/// or anything that needs to be run on a regular basis.
///
/// This file is best run from cron on the host system (ie outside PHP).
/// The script can either be invoked via the web server or via a standalone
/// version of PHP compiled for CGI.
///
/// eg wget -q -O /dev/null 'http://moodle.somewhere.edu/admin/cron.php'
/// or php /web/moodle/admin/cron.php
set_time_limit(0);
$starttime = microtime();
/// The following is a hack necessary to allow this script to work well
/// from the command line.
define('FULLME', 'cron');
/// Do not set moodle cookie because we do not need it here, it is better to emulate session
$nomoodlecookie = true;
/// The current directory in PHP version 4.3.0 and above isn't necessarily the
/// directory of the script when run from the command line. The require_once()
/// would fail, so we'll have to chdir()
if (!isset($_SERVER['REMOTE_ADDR']) && isset($_SERVER['argv'][0])) {
chdir(dirname($_SERVER['argv'][0]));
}
require_once(dirname(__FILE__) . '/../config.php');
require_once($CFG->libdir.'/adminlib.php');
require_once($CFG->libdir.'/gradelib.php');
/// Extra debugging (set in config.php)
if (!empty($CFG->showcronsql)) {
$db->debug = true;
}
if (!empty($CFG->showcrondebugging)) {
$CFG->debug = DEBUG_DEVELOPER;
$CFG->debugdisplay = true;
}
/// extra safety
@session_write_close();
/// check if execution allowed
if (isset($_SERVER['REMOTE_ADDR'])) { // if the script is accessed via the web.
if (!empty($CFG->cronclionly)) {
// This script can only be run via the cli.
print_error('cronerrorclionly', 'admin');
exit;
}
// This script is being called via the web, so check the password if there is one.
if (!empty($CFG->cronremotepassword)) {
$pass = optional_param('password', '', PARAM_RAW);
if($pass != $CFG->cronremotepassword) {
// wrong password.
print_error('cronerrorpassword', 'admin');
exit;
}
}
}
/// emulate normal session
$SESSION = new object();
$USER = get_admin(); /// Temporarily, to provide environment for this script
/// ignore admins timezone, language and locale - use site deafult instead!
$USER->timezone = $CFG->timezone;
$USER->lang = '';
$USER->theme = '';
course_setup(SITEID);
/// send mime type and encoding
if (check_browser_version('MSIE')) {
//ugly IE hack to work around downloading instead of viewing
@header('Content-Type: text/html; charset=utf-8');
echo "<xmp>"; //<pre> is not good enough for us here
} else {
//send proper plaintext header
@header('Content-Type: text/plain; charset=utf-8');
}
/// no more headers and buffers
while(@ob_end_flush());
/// increase memory limit (PHP 5.2 does different calculation, we need more memory now)
@raise_memory_limit('128M');
/// Start output log
$timenow = time();
mtrace("Server Time: ".date('r',$timenow)."\n\n");
/// Run all cron jobs for each module
mtrace("Starting activity modules");
get_mailer('buffer');
if ($mods = get_records_select("modules", "cron > 0 AND (($timenow - lastcron) > cron) AND visible = 1 ")) {
foreach ($mods as $mod) {
$libfile = "$CFG->dirroot/mod/$mod->name/lib.php";
if (file_exists($libfile)) {
include_once($libfile);
$cron_function = $mod->name."_cron";
if (function_exists($cron_function)) {
mtrace("Processing module function $cron_function ...", '');
$pre_dbqueries = null;
if (!empty($PERF->dbqueries)) {
$pre_dbqueries = $PERF->dbqueries;
$pre_time = microtime(1);
}
if ($cron_function()) {
if (! set_field("modules", "lastcron", $timenow, "id", $mod->id)) {
mtrace("Error: could not update timestamp for $mod->fullname");
}
}
if (isset($pre_dbqueries)) {
mtrace("... used " . ($PERF->dbqueries - $pre_dbqueries) . " dbqueries");
mtrace("... used " . (microtime(1) - $pre_time) . " seconds");
}
/// Reset possible changes by modules to time_limit. MDL-11597
@set_time_limit(0);
mtrace("done.");
}
}
}
}
get_mailer('close');
mtrace("Finished activity modules");
mtrace("Starting blocks");
if ($blocks = get_records_select("block", "cron > 0 AND (($timenow - lastcron) > cron) AND visible = 1")) {
// we will need the base class.
require_once($CFG->dirroot.'/blocks/moodleblock.class.php');
foreach ($blocks as $block) {
$blockfile = $CFG->dirroot.'/blocks/'.$block->name.'/block_'.$block->name.'.php';
if (file_exists($blockfile)) {
require_once($blockfile);
$classname = 'block_'.$block->name;
$blockobj = new $classname;
if (method_exists($blockobj,'cron')) {
mtrace("Processing cron function for ".$block->name.'....','');
if ($blockobj->cron()) {
if (!set_field('block','lastcron',$timenow,'id',$block->id)) {
mtrace('Error: could not update timestamp for '.$block->name);
}
}
/// Reset possible changes by blocks to time_limit. MDL-11597
@set_time_limit(0);
mtrace('done.');
}
}
}
}
mtrace('Finished blocks');
mtrace('Starting admin reports');
// Admin reports do not have a database table that lists them. Instead a
// report includes cron.php with function report_reportname_cron() if it wishes
// to be cronned. It is up to cron.php to handle e.g. if it only needs to
// actually do anything occasionally.
$reports = get_list_of_plugins($CFG->admin.'/report');
foreach($reports as $report) {
$cronfile = $CFG->dirroot.'/'.$CFG->admin.'/report/'.$report.'/cron.php';
if (file_exists($cronfile)) {
require_once($cronfile);
$cronfunction = 'report_'.$report.'_cron';
mtrace('Processing cron function for '.$report.'...', '');
$pre_dbqueries = null;
if (!empty($PERF->dbqueries)) {
$pre_dbqueries = $PERF->dbqueries;
$pre_time = microtime(true);
}
$cronfunction();
if (isset($pre_dbqueries)) {
mtrace("... used " . ($PERF->dbqueries - $pre_dbqueries) . " dbqueries");
mtrace("... used " . round(microtime(true) - $pre_time, 2) . " seconds");
}
mtrace('done.');
}
}
mtrace('Finished admin reports');
if (!empty($CFG->langcache)) {
mtrace('Updating languages cache');
get_list_of_languages(true);
}
mtrace('Removing expired enrolments ...', ''); // See MDL-8785
$timenow = time();
$somefound = false;
// The preferred way saves memory, dmllib.php
// find courses where limited enrolment is enabled
global $CFG;
$rs_enrol = get_recordset_sql("SELECT ra.roleid, ra.userid, ra.contextid
FROM {$CFG->prefix}course c
INNER JOIN {$CFG->prefix}context cx ON cx.instanceid = c.id
INNER JOIN {$CFG->prefix}role_assignments ra ON ra.contextid = cx.id
WHERE cx.contextlevel = '".CONTEXT_COURSE."'
AND ra.timeend > 0
AND ra.timeend < '$timenow'
AND c.enrolperiod > 0
");
while ($oldenrolment = rs_fetch_next_record($rs_enrol)) {
role_unassign($oldenrolment->roleid, $oldenrolment->userid, 0, $oldenrolment->contextid);
$somefound = true;
}
rs_close($rs_enrol);
if($somefound) {
mtrace('Done');
} else {
mtrace('none found');
}
mtrace('Starting main gradebook job ...');
grade_cron();
mtrace('done.');
/// Run all core cron jobs, but not every time since they aren't too important.
/// These don't have a timer to reduce load, so we'll use a random number
/// to randomly choose the percentage of times we should run these jobs.
srand ((double) microtime() * 10000000);
$random100 = rand(0,100);
if ($random100 < 20) { // Approximately 20% of the time.
mtrace("Running clean-up tasks...");
/// Unenrol users who haven't logged in for $CFG->longtimenosee
if ($CFG->longtimenosee) { // value in days
$cuttime = $timenow - ($CFG->longtimenosee * 3600 * 24);
$rs = get_recordset_sql ("SELECT id, userid, courseid
FROM {$CFG->prefix}user_lastaccess
WHERE courseid != ".SITEID."
AND timeaccess < $cuttime ");
while ($assign = rs_fetch_next_record($rs)) {
if ($context = get_context_instance(CONTEXT_COURSE, $assign->courseid)) {
if (role_unassign(0, $assign->userid, 0, $context->id)) {
mtrace("removing user $assign->userid from course $assign->courseid as they have not accessed the course for over $CFG->longtimenosee days");
}
}
}
rs_close($rs);
/// Execute the same query again, looking for remaining records and deleting them
/// if the user hasn't moodle/course:view in the CONTEXT_COURSE context (orphan records)
$rs = get_recordset_sql ("SELECT id, userid, courseid
FROM {$CFG->prefix}user_lastaccess
WHERE courseid != ".SITEID."
AND timeaccess < $cuttime ");
while ($assign = rs_fetch_next_record($rs)) {
if ($context = get_context_instance(CONTEXT_COURSE, $assign->courseid)) {
if (!has_capability('moodle/course:view', $context, $assign->userid)) {
delete_records('user_lastaccess', 'userid', $assign->userid, 'courseid', $assign->courseid);
mtrace("Deleted orphan user_lastaccess for user $assign->userid from course $assign->courseid");
}
}
}
rs_close($rs);
}
flush();
/// Delete users who haven't confirmed within required period
if (!empty($CFG->deleteunconfirmed)) {
$cuttime = $timenow - ($CFG->deleteunconfirmed * 3600);
$rs = get_recordset_sql ("SELECT id, firstname, lastname
FROM {$CFG->prefix}user
WHERE confirmed = 0
AND firstaccess > 0
AND firstaccess < $cuttime");
while ($user = rs_fetch_next_record($rs)) {
if (delete_records('user', 'id', $user->id)) {
mtrace("Deleted unconfirmed user for ".fullname($user, true)." ($user->id)");
}
}
rs_close($rs);
}
flush();
/// Delete users who haven't completed profile within required period
if (!empty($CFG->deleteincompleteusers)) {
$cuttime = $timenow - ($CFG->deleteincompleteusers * 3600);
$rs = get_recordset_sql ("SELECT id, username
FROM {$CFG->prefix}user
WHERE confirmed = 1
AND lastaccess > 0
AND lastaccess < $cuttime
AND deleted = 0
AND (lastname = '' OR firstname = '' OR email = '')");
while ($user = rs_fetch_next_record($rs)) {
if (delete_user($user)) {
mtrace("Deleted not fully setup user $user->username ($user->id)");
}
}
rs_close($rs);
}
flush();
/// Delete old logs to save space (this might need a timer to slow it down...)
if (!empty($CFG->loglifetime)) { // value in days
$loglifetime = $timenow - ($CFG->loglifetime * 3600 * 24);
if (delete_records_select("log", "time < '$loglifetime'")) {
mtrace("Deleted old log records");
}
}
flush();
/// Delete old cached texts
if (!empty($CFG->cachetext)) { // Defined in config.php
$cachelifetime = time() - $CFG->cachetext - 60; // Add an extra minute to allow for really heavy sites
if (delete_records_select('cache_text', "timemodified < '$cachelifetime'")) {
mtrace("Deleted old cache_text records");
}
}
flush();
if (!empty($CFG->notifyloginfailures)) {
notify_login_failures();
mtrace('Notified login failured');
}
flush();
sync_metacourses();
mtrace('Synchronised metacourses');
//
// generate new password emails for users
//
mtrace('checking for create_password');
if (count_records('user_preferences', 'name', 'create_password', 'value', '1')) {
mtrace('creating passwords for new users');
$newusers = get_records_sql("SELECT u.id as id, u.email, u.firstname,
u.lastname, u.username,
p.id as prefid
FROM {$CFG->prefix}user u
JOIN {$CFG->prefix}user_preferences p ON u.id=p.userid
WHERE p.name='create_password' AND p.value='1' AND u.email !='' ");
foreach ($newusers as $newuserid => $newuser) {
$newuser->emailstop = 0; // send email regardless
// email user
if (setnew_password_and_mail($newuser)) {
// remove user pref
delete_records('user_preferences', 'id', $newuser->prefid);
} else {
trigger_error("Could not create and mail new user password!");
}
}
}
if (!empty($CFG->usetags)) {
require_once($CFG->dirroot.'/tag/lib.php');
tag_cron();
mtrace ('Executed tag cron');
}
// Accesslib stuff
cleanup_contexts();
mtrace ('Cleaned up contexts');
gc_cache_flags();
mtrace ('Cleaned cache flags');
// If you suspect that the context paths are somehow corrupt
// replace the line below with: build_context_path(true);
build_context_path();
mtrace ('Built context paths');
mtrace("Finished clean-up tasks...");
} // End of occasional clean-up tasks
if (empty($CFG->disablescheduledbackups)) { // Defined in config.php
//Execute backup's cron
//Perhaps a long time and memory could help in large sites
@set_time_limit(0);
@raise_memory_limit("192M");
if (function_exists('apache_child_terminate')) {
// if we are running from Apache, give httpd a hint that
// it can recycle the process after it's done. Apache's
// memory management is truly awful but we can help it.
@apache_child_terminate();
}
if (file_exists("$CFG->dirroot/backup/backup_scheduled.php") and
file_exists("$CFG->dirroot/backup/backuplib.php") and
file_exists("$CFG->dirroot/backup/lib.php") and
file_exists("$CFG->libdir/blocklib.php")) {
include_once("$CFG->dirroot/backup/backup_scheduled.php");
include_once("$CFG->dirroot/backup/backuplib.php");
include_once("$CFG->dirroot/backup/lib.php");
require_once ("$CFG->libdir/blocklib.php");
mtrace("Running backups if required...");
if (! schedule_backup_cron()) {
mtrace("ERROR: Something went wrong while performing backup tasks!!!");
} else {
mtrace("Backup tasks finished.");
}
}
}
if (!empty($CFG->enablerssfeeds)) { //Defined in admin/variables page
include_once("$CFG->libdir/rsslib.php");
mtrace("Running rssfeeds if required...");
if ( ! cron_rss_feeds()) {
mtrace("Something went wrong while generating rssfeeds!!!");
} else {
mtrace("Rssfeeds finished");
}
}
/// Run the auth cron, if any
/// before enrolments because it might add users that will be needed in enrol plugins
$auths = get_enabled_auth_plugins();
mtrace("Running auth crons if required...");
foreach ($auths as $auth) {
$authplugin = get_auth_plugin($auth);
if (method_exists($authplugin, 'cron')) {
mtrace("Running cron for auth/$auth...");
$authplugin->cron();
if (!empty($authplugin->log)) {
mtrace($authplugin->log);
}
}
unset($authplugin);
}
/// Run the enrolment cron, if any
if (!($plugins = explode(',', $CFG->enrol_plugins_enabled))) {
$plugins = array($CFG->enrol);
}
require_once($CFG->dirroot .'/enrol/enrol.class.php');
foreach ($plugins as $p) {
$enrol = enrolment_factory::factory($p);
if (method_exists($enrol, 'cron')) {
$enrol->cron();
}
if (!empty($enrol->log)) {
mtrace($enrol->log);
}
unset($enrol);
}
if (!empty($CFG->enablestats) and empty($CFG->disablestatsprocessing)) {
require_once($CFG->dirroot.'/lib/statslib.php');
// check we're not before our runtime
$timetocheck = stats_get_base_daily() + $CFG->statsruntimestarthour*60*60 + $CFG->statsruntimestartminute*60;
if (time() > $timetocheck) {
// process configured number of days as max (defaulting to 31)
$maxdays = empty($CFG->statsruntimedays) ? 31 : abs($CFG->statsruntimedays);
if (stats_cron_daily($maxdays)) {
if (stats_cron_weekly()) {
if (stats_cron_monthly()) {
stats_clean_old();
}
}
}
@set_time_limit(0);
} else {
mtrace('Next stats run after:'. userdate($timetocheck));
}
}
// run gradebook import/export/report cron
if ($gradeimports = get_list_of_plugins('grade/import')) {
foreach ($gradeimports as $gradeimport) {
if (file_exists($CFG->dirroot.'/grade/import/'.$gradeimport.'/lib.php')) {
require_once($CFG->dirroot.'/grade/import/'.$gradeimport.'/lib.php');
$cron_function = 'grade_import_'.$gradeimport.'_cron';
if (function_exists($cron_function)) {
mtrace("Processing gradebook import function $cron_function ...", '');
$cron_function();
}
}
}
}
if ($gradeexports = get_list_of_plugins('grade/export')) {
foreach ($gradeexports as $gradeexport) {
if (file_exists($CFG->dirroot.'/grade/export/'.$gradeexport.'/lib.php')) {
require_once($CFG->dirroot.'/grade/export/'.$gradeexport.'/lib.php');
$cron_function = 'grade_export_'.$gradeexport.'_cron';
if (function_exists($cron_function)) {
mtrace("Processing gradebook export function $cron_function ...", '');
$cron_function();
}
}
}
}
if ($gradereports = get_list_of_plugins('grade/report')) {
foreach ($gradereports as $gradereport) {
if (file_exists($CFG->dirroot.'/grade/report/'.$gradereport.'/lib.php')) {
require_once($CFG->dirroot.'/grade/report/'.$gradereport.'/lib.php');
$cron_function = 'grade_report_'.$gradereport.'_cron';
if (function_exists($cron_function)) {
mtrace("Processing gradebook report function $cron_function ...", '');
$cron_function();
}
}
}
}
// run any customized cronjobs, if any
// looking for functions in lib/local/cron.php
if (file_exists($CFG->dirroot.'/local/cron.php')) {
mtrace('Processing customized cron script ...', '');
include_once($CFG->dirroot.'/local/cron.php');
mtrace('done.');
}
//Unset session variables and destroy it
@session_unset();
@session_destroy();
mtrace("Cron script completed correctly");
$difftime = microtime_diff($starttime, microtime());
mtrace("Execution took ".$difftime." seconds");
/// finish the IE hack
if (check_browser_version('MSIE')) {
echo "</xmp>";
}
?>
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