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https://github.com/moodle/moodle.git
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108 lines
3.9 KiB
PHP
108 lines
3.9 KiB
PHP
<?PHP // $Id$
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/// This script looks through all the module directories for cron.php files
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/// and runs them. These files can contain cleanup functions, email functions
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/// or anything that needs to be run on a regular basis.
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///
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/// This file is best run from cron on the host system (ie outside PHP).
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/// The script can either be invoked via the web server or via a standalone
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/// version of PHP compiled for CGI.
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///
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/// eg wget -q -O /dev/null 'http://moodle.somewhere.edu/admin/cron.php'
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/// or php /web/moodle/admin/cron.php
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$FULLME = "cron";
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$starttime = microtime();
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require_once("../config.php");
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echo "<pre>\n";
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$timenow = time();
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/// Run all cron jobs for each module
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if ($mods = get_records_select("modules", "cron > 0 AND (($timenow - lastcron) > cron)")) {
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foreach ($mods as $mod) {
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$libfile = "$CFG->dirroot/mod/$mod->name/lib.php";
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if (file_exists($libfile)) {
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include_once($libfile);
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$cron_function = $mod->name."_cron";
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if (function_exists($cron_function)) {
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if ($cron_function()) {
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if (! set_field("modules", "lastcron", $timenow, "id", $mod->id)) {
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echo "Error: could not update timestamp for $mod->fullname\n";
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}
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}
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}
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}
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}
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}
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/// Run all core cron jobs, but not every time since they aren't too important.
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/// These don't have a timer to reduce load, so we'll use a random number
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/// to randomly choose the percentage of times we should run these jobs.
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srand ((double) microtime() * 10000000);
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$random100 = rand(0,100);
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if ($random100 < 20) { // Approximately 20% of the time.
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echo "Running clean-up tasks...\n";
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/// Unenrol users who haven't logged in for $CFG->longtimenosee
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if ($CFG->longtimenosee) { // value in days
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$longtime = $timenow - ($CFG->longtimenosee * 3600 * 24);
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if ($students = get_users_longtimenosee($longtime)) {
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foreach ($students as $student) {
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if (unenrol_student($student->userid, $student->course)) {
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echo "Deleted student enrolment for user $student->userid from course $student->course\n";
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}
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}
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}
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}
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/// Delete users who haven't confirmed within seven days
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$oneweek = $timenow - (7 * 24 * 3600);
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if ($users = get_users_unconfirmed($oneweek)) {
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foreach ($users as $user) {
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if (delete_records("user", "id", $user->id)) {
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echo "Deleted unconfirmed user for ".fullname($user, true)." ($user->id)\n";
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}
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}
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}
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/// Delete duplicate enrolments (don't know what causes these yet - expired sessions?)
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if ($users = get_records_select("user_students", "userid > 0 GROUP BY course, userid ".
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"HAVING count(*) > 1", "", "*,count(*)")) {
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foreach ($users as $user) {
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delete_records_select("user_students", "userid = '$user->userid' ".
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"AND course = '$user->course' AND id <> '$user->id'");
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}
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}
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/// Delete old logs to save space (this might need a timer to slow it down...)
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if (!empty($CFG->loglifetime)) { // value in days
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$loglifetime = $timenow - ($CFG->loglifetime * 3600 * 24);
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delete_records_select("log", "time < '$loglifetime'");
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}
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}
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if (file_exists("$CFG->dataroot/cronextra.php")) {
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include("$CFG->dataroot/cronextra.php");
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}
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echo "Cron script completed correctly\n";
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$difftime = microtime_diff($starttime, microtime());
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echo "Execution took ".$difftime." seconds\n";
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?>
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