chamilo-lms/tests/scripts/delete_old_courses_even_not_empty.php

<?php
/**
 * This script deletes all courses created and last visited before
 * a specific date (to be edited below)
 */

exit;

require_once '../../main/inc/global.inc.php';

if (PHP_SAPI !== 'cli') {
    die('This script can only be executed from the command line');
}

// The date before which the course must have been created to be considered
$creation = '2018-12-14';
// The last date at which the course must have been accessed to be considered.
// If it was accessed *after* that date, it will NOT be considered for deletion.
$access = '2018-12-14';

$tableExercise = Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCICES);
$tableCourse = Database::get_main_table(TABLE_MAIN_COURSE);

$sql = "SELECT
            id, code, directory, creation_date, last_visit
        FROM $tableCourse c
        WHERE creation_date < '$creation' AND (last_visit < '$access' OR last_visit is NULL) ".
// Change this line to avoid deleting specifi courses
//        "AND c.code NOT IN ('CHAMILOTEACHER', 'CHAMILOADMIN') ".
        "ORDER by code
";
echo $sql.PHP_EOL;

$result = Database::query($sql);
$items = Database::store_result($result, 'ASSOC');
$total = 0;
$count = 0;
if (!empty($items)) {
    foreach ($items as $item) {
        $size = exec('du -sh '.__DIR__.'/../../app/courses/'.$item['directory']);
        list($mysize, $mypath) = preg_split('/\t/', $size);
        $size = trim($mysize);
        echo "[$count] Course ".$item['code'].'('.$item['id'].') created on '.$item['creation_date'].' and last used on '.$item['last_visit'].' uses '.$size.PHP_EOL;
        CourseManager::delete_course($item['code']);
        // The normal procedure moves the course directory to archive, so
        // delete it there as well
        echo('rm -rf '.__DIR__.'/../../app/courses/'.$item['directory']).PHP_EOL;
        exec('rm -rf '.__DIR__.'/../../app/courses/'.$item['directory']);
        echo('rm -rf '.__DIR__.'/../../app/cache/'.$item['directory'].'_*').PHP_EOL;
        exec('rm -rf '.__DIR__.'/../../app/cache/'.$item['directory'].'_*');
        // The normal procedure also created a database dump, but it is
        // stored in the course folder, so no issue there...       
        $matches = [];
        preg_match('/^(\d+)(\D)$/', $size, $matches);
        switch($matches[2]) {
            case 'K':
                $total += $matches[1];
                break;
            case 'M':
                $total += $matches[1]*1024;
                break;
            case 'G':
                $total += $matches[1]*1024*1024;
                break;
        }
        $count ++;
        if ($count%100 == 0) {
            echo '### Until now: '.$total.'K in '.$count.' courses'.PHP_EOL;
        }
    }
}
echo $total.'K in '.$count.' courses'.PHP_EOL;