user/index.php

   1 <?PHP // $Id$
   2
   3 //  Lists all the users within a given course
   4
   5     require_once('../config.php');
   6     require_once($CFG->libdir.'/tablelib.php');
   7
   8     define('USER_SMALL_CLASS', 20);   // Below this is considered small
   9     define('USER_LARGE_CLASS', 200);  // Above this is considered large
  10     define('DEFAULT_PAGE_SIZE', 20);
  11
  12     $id           = required_param('id', PARAM_INT);                          // Course id
  13     $group        = optional_param('group', -1, PARAM_INT);                   // Group to show
  14     $page         = optional_param('page', 0, PARAM_INT);                     // which page to show
  15     $perpage      = optional_param('perpage', DEFAULT_PAGE_SIZE, PARAM_INT);  // how many per page
  16     $mode         = optional_param('mode', NULL);                             // '0' for less details, '1' for more
  17     $showteachers = optional_param('teachers', 1, PARAM_INT);                 // do we want to see the teacher list?
  18     $accesssince  = optional_param('accesssince',0,PARAM_INT);               // filter by last access. -1 = never
  19     $search       = optional_param('search','',PARAM_CLEAN);
  20
  21     $showteachers = $showteachers && empty($search); // if we're searching, we just want students.
  22
  23     if (! $course = get_record('course', 'id', $id)) {
  24         error("Course ID is incorrect");
  25     }
  26
  27     require_login($course->id);
  28
  29     if (!$course->category) {
  30         if (!$CFG->showsiteparticipantslist and !isteacher(SITEID)) {
  31             print_header("$course->shortname: ".get_string('participants'), $course->fullname,
  32                          get_string('participants'), "", "", true, "&nbsp;", navmenu($course));
  33             notice(get_string('sitepartlist0'));
  34         }
  35         if ($CFG->showsiteparticipantslist < 2 and !isteacherinanycourse()) {
  36             print_header("$course->shortname: ".get_string('participants'), $course->fullname,
  37                          get_string('participants'), "", "", true, "&nbsp;", navmenu($course));
  38             notice(get_string('sitepartlist1'));
  39         }
  40     }
  41
  42     add_to_log($course->id, 'user', 'view all', 'index.php?id='.$course->id, '');
  43
  44     $isteacher = isteacher($course->id);
  45
  46     if (empty($isteacher)) {
  47         $search = false;
  48     }
  49
  50     $countries = get_list_of_countries();
  51
  52     $strnever = get_string('never');
  53
  54     $datestring->day   = get_string('day');
  55     $datestring->days  = get_string('days');
  56     $datestring->hour  = get_string('hour');
  57     $datestring->hours = get_string('hours');
  58     $datestring->min   = get_string('min');
  59     $datestring->mins  = get_string('mins');
  60     $datestring->sec   = get_string('sec');
  61     $datestring->secs  = get_string('secs');
  62
  63     if ($mode !== NULL) {
  64         $SESSION->userindexmode = $fullmode = ($mode == 1);
  65     } else if (isset($SESSION->userindexmode)) {
  66         $fullmode = $SESSION->userindexmode;
  67     } else {
  68         $fullmode = false;
  69     }
  70
  71 /// Check to see if groups are being used in this forum
  72 /// and if so, set $currentgroup to reflect the current group
  73
  74     $groupmode    = groupmode($course);   // Groups are being used
  75     $currentgroup = get_and_set_current_group($course, $groupmode, $group);
  76
  77     if (!$currentgroup) {      // To make some other functions work better later
  78         $currentgroup  = NULL;
  79     }
  80
  81     $isseparategroups = ($course->groupmode == SEPARATEGROUPS and $course->groupmodeforce and
  82                          !isteacheredit($course->id));
  83
  84     if ($isseparategroups and (!$currentgroup) ) {  //XXX
  85         print_heading(get_string("notingroup", "forum"));
  86         print_footer($course);
  87         exit;
  88     }
  89
  90     // Should use this variable so that we don't break stuff every time a variable is added or changed.
  91     $baseurl = $CFG->wwwroot.'/user/index.php?id='.$course->id.'&amp;group='.$currentgroup.'&amp;perpage='.$perpage.'&amp;teachers='.$showteachers.'&amp;accesssince='.$accesssince.'&amp;search='.$search;
  92
  93 /// Print headers
  94
  95     if ($course->category) {
  96         print_header("$course->shortname: ".get_string('participants'), $course->fullname,
  97                      "<a href=\"../course/view.php?id=$course->id\">$course->shortname</a> -> ".
  98                      get_string('participants'), "", "", true, "&nbsp;", navmenu($course));
  99     } else {
 100         print_header("$course->shortname: ".get_string('participants'), $course->fullname,
 101                      get_string('participants'), "", "", true, "&nbsp;", navmenu($course));
 102     }
 103
 104
 105     //setting up tags
 106     if ($id == SITEID) {
 107         $filtertype = 'site';
 108     } else if ($id && !$currentgroup) {
 109         $filtertype = 'course';
 110         $filterselect = $id;
 111     } else {
 112         $filtertype = 'group';
 113         $filterselect = $currentgroup;
 114     }
 115     $currenttab = 'participants';
 116     $user = $USER;
 117
 118     require_once($CFG->dirroot .'/user/tabs.php');
 119
 120
 121 /// Get the hidden field list
 122     if ($isteacher || isadmin()) {
 123         $hiddenfields = array();  // teachers and admins are allowed to see everything
 124     } else {
 125         $hiddenfields = array_flip(explode(',', $CFG->hiddenuserfields));
 126     }
 127
 128 /// Print settings and things in a table across the top
 129
 130     echo '<table class="controls" cellspacing="0"><tr>';
 131
 132     //print my course menus
 133     echo '<td class="left">';
 134     print_string('mycourses');
 135     echo ': ';
 136     $mycourses = get_my_courses($USER->id);
 137     foreach ($mycourses as $mycourse) {
 138         $my_course[$mycourse->id] = $mycourse->shortname;
 139     }
 140     //choose_from_menu($my_course, 'id', $course->id, '', 'courseform.submit()');
 141     popup_form($CFG->wwwroot.'/user/index.php?id=',$my_course,'courseform',$course->id);
 142     echo '</td></tr>';
 143
 144     if ($groupmode == VISIBLEGROUPS or ($groupmode and isteacheredit($course->id))) {
 145         if ($groups = get_records_menu("groups", "courseid", $course->id, "name ASC", "id,name")) {
 146             echo '<td class="left">';
 147             print_group_menu($groups, $groupmode, $currentgroup, $baseurl);
 148             echo '</td>';
 149         }
 150     }
 151
 152     if (!empty($isteacher)) {
 153         // get minimum lastaccess for this course and display a dropbox to filter by lastaccess going back this far.
 154         $minlastaccess = get_field_sql('SELECT min(timeaccess) FROM '.$CFG->prefix.'user_students WHERE course = '.$course->id.' AND timeaccess != 0');
 155
 156         $lastaccess0exists = record_exists('user_students','course',$course->id,'timeaccess',0);
 157         $now = usergetmidnight(time());
 158         $timeaccess = array();
 159
 160         // makes sense for this to go first.
 161         $timeoptions[0] = get_string('selectperiod');
 162
 163         // days
 164         for ($i = 1; $i < 7; $i++) {
 165             if (strtotime('-'.$i.' days',$now) >= $minlastaccess) {
 166                 $timeoptions[strtotime('-'.$i.' days',$now)] = get_string('numdays','moodle',$i);
 167             }
 168         }
 169         // weeks
 170         for ($i = 1; $i < 10; $i++) {
 171             if (strtotime('-'.$i.' weeks',$now) >= $minlastaccess) {
 172                 $timeoptions[strtotime('-'.$i.' weeks',$now)] = get_string('numweeks','moodle',$i);
 173             }
 174         }
 175         // months
 176         for ($i = 2; $i < 12; $i++) {
 177             if (strtotime('-'.$i.' months',$now) >= $minlastaccess) {
 178                 $timeoptions[strtotime('-'.$i.' months',$now)] = get_string('nummonths','moodle',$i);
 179             }
 180         }
 181         // try a year
 182         if (strtotime('-1 year',$now) >= $minlastaccess) {
 183             $timeoptions[strtotime('-1 year',$now)] = get_string('lastyear');
 184         }
 185
 186         if (!empty($lastaccess0exists)) {
 187             $timeoptions[-1] = get_string('never');
 188         }
 189
 190         if (count($timeoptions) > 1) {
 191             echo '<td class="left">';
 192             echo get_string('usersnoaccesssince').': ';
 193             $baseurl = preg_replace('/&amp;accesssince='.$accesssince.'/','',$baseurl);
 194             echo popup_form($baseurl.'&amp;accesssince=',$timeoptions,'timeoptions',$accesssince,'','','',true);
 195             echo '</td>';
 196         }
 197     }
 198
 199     echo '<td class="right">';
 200     echo get_string('userlist').': ';
 201     $formatmenu = array( '0' => get_string('detailedless'),
 202                          '1' => get_string('detailedmore'));
 203     echo popup_form($baseurl.'&amp;mode=', $formatmenu, 'formatmenu', $fullmode, '', '', '', true);
 204     echo '</td></tr></table>';
 205
 206     if ($currentgroup and (!$isseparategroups or isteacheredit($course->id))) {    /// Display info about the group
 207         if ($group = get_record('groups', 'id', $currentgroup)) {
 208             if (!empty($group->description) or (!empty($group->picture) and empty($group->hidepicture))) {
 209                 echo '<table class="groupinfobox"><tr><td class="left side picture">';
 210                 print_group_picture($group, $course->id, true, false, false);
 211                 echo '</td><td class="content">';
 212                 echo '<h3>'.$group->name;
 213                 if (isteacheredit($course->id)) {
 214                     echo '&nbsp;<a title="'.get_string('editgroupprofile').'" href="../course/groups.php?id='.$course->id.'&amp;group='.$group->id.'">';
 215                     echo '<img src="'.$CFG->pixpath.'/t/edit.gif" alt="" border="0">';
 216                     echo '</a>';
 217                 }
 218                 echo '</h3>';
 219                 echo format_text($group->description);
 220                 echo '</td></tr></table>';
 221             }
 222         }
 223     }
 224
 225
 226     $exceptions = array(); // This will be an array of userids that are shown as teachers and thus
 227                            // do not have to be shown as users as well. Only relevant on site course.
 228
 229     if ($isteacher) {
 230         echo '
 231 <script Language="JavaScript">
 232 <!--
 233 function checksubmit(form) {
 234     var destination = form.formaction.options[form.formaction.selectedIndex].value;
 235     if (destination == "" || !checkchecked(form)) {
 236         form.formaction.selectedIndex = 0;
 237         return false;
 238     } else {
 239         return true;
 240     }
 241 }
 242
 243 function checkchecked(form) {
 244     var inputs = document.getElementsByTagName(\'INPUT\');
 245     var checked = false;
 246     inputs = filterByParent(inputs, function() {return form;});
 247     for(var i = 0; i < inputs.length; ++i) {
 248         if(inputs[i].type == \'checkbox\' && inputs[i].checked) {
 249             checked = true;
 250         }
 251     }
 252     return checked;
 253 }
 254 //-->
 255 </script>
 256 ';
 257         echo '<form action="action_redir.php" method="post" name="studentsform" onSubmit="return checksubmit(this);">';
 258         echo '<input type="hidden" name="id" value="'.$id.'" />';
 259         echo '<input type="hidden" name="returnto" value="'.$_SERVER['REQUEST_URI'].'" />';
 260         echo '<input type="hidden" name="sesskey" value="'.$USER->sesskey.'" />';
 261     }
 262
 263     if($showteachers) {
 264
 265         $tablecolumns = array('picture', 'fullname');
 266         $tableheaders = array('', get_string('fullname'));
 267         if (!isset($hiddenfields['city'])) {
 268             $tablecolumns[] = 'city';
 269             $tableheaders[] = get_string('city');
 270         }
 271         if (!isset($hiddenfields['country'])) {
 272             $tablecolumns[] = 'country';
 273             $tableheaders[] = get_string('country');
 274         }
 275         if (!isset($hiddenfields['lastaccess'])) {
 276             $tablecolumns[] = 'lastaccess';
 277             $tableheaders[] = get_string('lastaccess');
 278         }
 279
 280         if ($isteacher) {
 281             $tablecolumns[] = '';
 282             $tableheaders[] = get_string('select');
 283         }
 284
 285         $table = new flexible_table('user-index-teachers-'.$course->id);
 286
 287         $table->define_columns($tablecolumns);
 288         $table->define_headers($tableheaders);
 289         $table->define_baseurl($baseurl);
 290
 291         $table->sortable(true, 'lastaccess', SORT_DESC);
 292
 293         $table->set_attribute('cellspacing', '0');
 294         $table->set_attribute('id', 'teachers');
 295         $table->set_attribute('class', 'generaltable generalbox');
 296
 297         $table->setup();
 298
 299         if($whereclause = $table->get_sql_where()) {
 300             $whereclause .= ' AND ';
 301         }
 302
 303         $teachersql = "SELECT u.id, u.username, u.firstname, u.lastname, u.maildisplay, u.mailformat, u.maildigest,
 304                                    u.email, u.maildisplay, u.city, u.country, u.lastlogin, u.picture, u.lang, u.timezone,
 305                                    u.emailstop, t.authority,t.role,t.editall,t.timeaccess as lastaccess, m.groupid
 306                             FROM {$CFG->prefix}user u
 307                        LEFT JOIN {$CFG->prefix}user_teachers t ON t.userid = u.id
 308                        LEFT JOIN {$CFG->prefix}groups_members m ON m.userid = u.id ";
 309
 310         if($isseparategroups) {
 311             $whereclause .= '(t.editall OR groupid = '.$currentgroup.') AND ';
 312         }
 313         else if ($currentgroup) {    // Displaying a group by choice
 314             $whereclause .= 'groupid = '.$currentgroup.' AND ';
 315         }
 316
 317         $teachersql .= 'WHERE '.$whereclause.' t.course = '.$course->id.' AND u.deleted = 0 AND u.confirmed = 1';
 318         if (!$isteacher) {
 319             $teachersql .= ' AND t.authority > 0';
 320         }
 321
 322         if ($isteacher) {
 323             $teachersql .= get_lastaccess_sql($accesssince);
 324         }
 325
 326         if($sortclause = $table->get_sql_sort()) {
 327             $teachersql .= ' ORDER BY '.$sortclause;
 328         }
 329
 330         $teachers = get_records_sql($teachersql);
 331
 332         if(!empty($teachers)) {
 333
 334             echo '<h2>'.$course->teachers;
 335             echo ' <a href="'.$baseurl.'&amp;teachers=0">';
 336             echo '<img src="'.$CFG->pixpath.'/i/hide.gif" height="16" width="16" alt="'.get_string('hide').'" /></a>';
 337             if (isadmin() or ($course->category and (iscreator() or (isteacheredit($course->id) and !empty($CFG->teacherassignteachers))))) {
 338                 echo ' <a href="'.$CFG->wwwroot.'/course/teacher.php?id='.$course->id.'">';
 339                 echo '<img src="'.$CFG->pixpath.'/i/edit.gif" height="16" width="16" alt="'.get_string('edit').'" /></a>';
 340             }
 341             echo '</h2>';
 342
 343             $exceptions = array_keys($teachers);
 344
 345             if ($fullmode) {
 346                 foreach ($teachers as $key => $teacher) {
 347                     print_user($teacher, $course, true);
 348                 }
 349             } else {
 350                 $countrysort = (strpos($sortclause, 'country') !== false);
 351                 foreach ($teachers as $teacher) {
 352
 353                     if ($teacher->lastaccess) {
 354                         $lastaccess = format_time(time() - $teacher->lastaccess, $datestring);
 355                     } else {
 356                         $lastaccess = $strnever;
 357                     }
 358
 359                     if (empty($teacher->country)) {
 360                         $country = '';
 361                     }
 362                     else {
 363                         if($countrysort) {
 364                             $country = '('.$teacher->country.') '.$countries[$teacher->country];
 365                         }
 366                         else {
 367                             $country = $countries[$teacher->country];
 368                         }
 369                     }
 370
 371                     $data = array (
 372                                     print_user_picture($teacher->id, $course->id, $teacher->picture, false, true),
 373                                     '<strong><a'.($teacher->authority?'':' class="dimmed"').' href="'.$CFG->wwwroot.'/user/view.php?id='.$teacher->id.'&amp;course='.$course->id.'">'.fullname($teacher, $isteacher).'</a></strong>');
 374                     if (!isset($hiddenfields['city'])) {
 375                         $data[] = $teacher->city;
 376                     }
 377                     if (!isset($hiddenfields['country'])) {
 378                         $data[] = $country;
 379                     }
 380                     if (!isset($hiddenfields['lastaccess'])) {
 381                         $data[] = $lastaccess;
 382                     }
 383                     if ($isteacher) {
 384                         $data[] = '<input type="checkbox" name="teacher'.$teacher->id.'" />';
 385                     }
 386                     $table->add_data($data);
 387                 }
 388
 389                 $table->print_html();
 390             }
 391         }
 392     }
 393     else {
 394         // Don't show teachers
 395         echo '<h2>'.$course->teachers;
 396         echo ' <a href="'.$baseurl.'&amp;teachers=1">';
 397         echo '<img src="'.$CFG->pixpath.'/i/show.gif" height="16" width="16" alt="'.get_string('show').'" /></a>';
 398         if (isadmin() or ($course->category and (iscreator() or (isteacheredit($course->id) and !empty($CFG->teacherassignteachers))))) {
 399             echo ' <a href="'.$CFG->wwwroot.'/course/teacher.php?id='.$course->id.'">';
 400             echo '<img src="'.$CFG->pixpath.'/i/edit.gif" height="16" width="16" alt="'.get_string('edit').'" /></a>';
 401         }
 402         echo '</h2>';
 403     }
 404
 405     $guest = get_guest();
 406     $exceptions[] = $guest->id;
 407
 408     $tablecolumns = array('picture', 'fullname');
 409     $tableheaders = array('', get_string('fullname'));
 410     if (!isset($hiddenfields['city'])) {
 411         $tablecolumns[] = 'city';
 412         $tableheaders[] = get_string('city');
 413     }
 414     if (!isset($hiddenfields['country'])) {
 415         $tablecolumns[] = 'country';
 416         $tableheaders[] = get_string('country');
 417     }
 418     if (!isset($hiddenfields['lastaccess'])) {
 419         $tablecolumns[] = 'lastaccess';
 420         $tableheaders[] = get_string('lastaccess');
 421     }
 422
 423     if ($course->enrolperiod) {
 424        $tablecolumns[] = 'timeend';
 425        $tableheaders[] = get_string('enrolmentend');
 426     }
 427
 428     if ($isteacher) {
 429        $tablecolumns[] = '';
 430        $tableheaders[] = get_string('select');
 431     }
 432
 433     $table = new flexible_table('user-index-students-'.$course->id);
 434
 435     $table->define_columns($tablecolumns);
 436     $table->define_headers($tableheaders);
 437     $table->define_baseurl($baseurl);
 438
 439     $table->sortable(true, 'lastaccess', SORT_DESC);
 440
 441     $table->set_attribute('cellspacing', '0');
 442     $table->set_attribute('id', 'students');
 443     $table->set_attribute('class', 'generaltable generalbox');
 444
 445     $table->set_control_variables(array(
 446         TABLE_VAR_SORT    => 'ssort',
 447         TABLE_VAR_HIDE    => 'shide',
 448         TABLE_VAR_SHOW    => 'sshow',
 449         TABLE_VAR_IFIRST  => 'sifirst',
 450         TABLE_VAR_ILAST   => 'silast',
 451         TABLE_VAR_PAGE    => 'spage'
 452     ));
 453     $table->setup();
 454
 455     if(SITEID == $course->id) {
 456         $select = 'SELECT u.id, u.username, u.firstname, u.lastname, u.email, u.city, u.country,
 457                       u.picture, u.lang, u.timezone, u.emailstop, u.maildisplay, u.lastaccess ';
 458         $from   = 'FROM '.$CFG->prefix.'user u ';
 459         $where  = 'WHERE confirmed = 1 AND u.deleted = 0 ';
 460     }
 461     else {
 462         $select = 'SELECT u.id, u.username, u.firstname, u.lastname, u.email, u.city, u.country,
 463                       u.picture, u.lang, u.timezone, u.emailstop, u.maildisplay, s.timeaccess AS lastaccess ';
 464         $select .= $course->enrolperiod?', s.timeend ':'';
 465         $from   = 'FROM '.$CFG->prefix.'user u LEFT JOIN '.$CFG->prefix.'user_students s ON s.userid = u.id ';
 466         $where  = 'WHERE s.course = '.$course->id.' AND u.deleted = 0 ';
 467     }
 468
 469     if ($isteacher) {
 470         $where .= get_lastaccess_sql($accesssince);
 471     }
 472
 473     $wheresearch = '';
 474
 475     if (!empty($search)) {
 476         $LIKE = sql_ilike();
 477         $fullname  = sql_fullname('u.firstname','u.lastname');
 478         $wheresearch .= ' AND ('. $fullname .' '. $LIKE .'\'%'. $search .'%\' OR email '. $LIKE .'\'%'. $search .'%\' OR idnumber '.$LIKE.' \'%'.$search.'%\') ';
 479
 480     }
 481
 482     if ($currentgroup) {    // Displaying a group by choice
 483         // FIX: TODO: This will not work if $currentgroup == 0, i.e. "those not in a group"
 484         $from  .= 'LEFT JOIN '.$CFG->prefix.'groups_members gm ON u.id = gm.userid ';
 485         $where .= ' AND gm.groupid = '.$currentgroup;
 486     }
 487
 488     if($course->id == SITEID) {
 489         $where .= ' AND u.id NOT IN ('.implode(',', $exceptions).')';
 490     }
 491
 492     $totalcount = count_records_sql('SELECT COUNT(*) '.$from.$where);
 493
 494     if($table->get_sql_where()) {
 495         $where .= ' AND '.$table->get_sql_where();
 496     }
 497
 498     if($table->get_sql_sort()) {
 499         $sort = ' ORDER BY '.$table->get_sql_sort();
 500     }
 501     else {
 502         $sort = '';
 503     }
 504
 505     $matchcount = count_records_sql('SELECT COUNT(*) '.$from.$where.$wheresearch);
 506
 507     $table->initialbars($totalcount > $perpage);
 508     $table->pagesize($perpage, $matchcount);
 509
 510     if($table->get_page_start() !== '' && $table->get_page_size() !== '') {
 511         $limit = ' '.sql_paging_limit($table->get_page_start(), $table->get_page_size());
 512     }
 513     else {
 514         $limit = '';
 515     }
 516
 517     $students = get_records_sql($select.$from.$where.$wheresearch.$sort.$limit);
 518
 519     $a->count = $totalcount;
 520     $a->items = $totalcount == 1 ? $course->student : $course->students;
 521     echo '<h2>'.get_string('counteditems', '', $a);
 522     if (isteacheredit($course->id)) {
 523         echo ' <a href="../course/student.php?id='.$course->id.'">';
 524         echo '<img src="'.$CFG->pixpath.'/i/edit.gif" height="16" width="16" alt="" /></a>';
 525     }
 526     echo '</h2>';
 527
 528     if ($CFG->longtimenosee > 0 && $CFG->longtimenosee < 1000 && $totalcount > 0) {
 529         echo '<p id="longtimenosee">('.get_string('unusedaccounts', '', $CFG->longtimenosee).')</p>';
 530     }
 531
 532     if ($fullmode) {    // Print simple listing
 533         if ($totalcount < 1) {
 534             print_heading(get_string("nostudentsfound", "", $course->students));
 535         }
 536         else {
 537
 538             if($totalcount > $perpage) {
 539
 540                 $firstinitial = $table->get_initial_first();
 541                 $lastinitial  = $table->get_initial_last();
 542                 $strall = get_string('all');
 543                 $alpha  = explode(',', get_string('alphabet'));
 544
 545                 // Bar of first initials
 546
 547                 echo '<div class="initialbar firstinitial">'.get_string('firstname').' : ';
 548                 if(!empty($firstinitial)) {
 549                     echo '<a href="'.$baseurl.'&amp;sifirst=">'.$strall.'</a>';
 550                 } else {
 551                     echo '<strong>'.$strall.'</strong>';
 552                 }
 553                 foreach ($alpha as $letter) {
 554                     if ($letter == $firstinitial) {
 555                         echo ' <strong>'.$letter.'</strong>';
 556                     } else {
 557                         echo ' <a href="'.$baseurl.'&amp;sifirst='.$letter.'">'.$letter.'</a>';
 558                     }
 559                 }
 560                 echo '</div>';
 561
 562                 // Bar of last initials
 563
 564                 echo '<div class="initialbar lastinitial">'.get_string('lastname').' : ';
 565                 if(!empty($lastinitial)) {
 566                     echo '<a href="'.$baseurl.'&amp;silast=">'.$strall.'</a>';
 567                 } else {
 568                     echo '<strong>'.$strall.'</strong>';
 569                 }
 570                 foreach ($alpha as $letter) {
 571                     if ($letter == $lastinitial) {
 572                         echo ' <strong>'.$letter.'</strong>';
 573                     } else {
 574                         echo ' <a href="'.$baseurl.'&amp;silast='.$letter.'">'.$letter.'</a>';
 575                     }
 576                 }
 577                 echo '</div>';
 578
 579                 print_paging_bar($matchcount, intval($table->get_page_start() / $perpage), $perpage, $baseurl.'&amp;', 'spage');
 580
 581             }
 582
 583             if($matchcount > 0) {
 584                 foreach ($students as $student) {
 585                     print_user($student, $course, true);
 586                 }
 587             }
 588             else {
 589                 print_heading(get_string('nothingtodisplay'));
 590             }
 591         }
 592     }
 593     else {
 594         $countrysort = (strpos($sort, 'country') !== false);
 595         $timeformat = get_string('strftimedate');
 596         if (!empty($students))  {
 597             foreach ($students as $student) {
 598                 if ($student->lastaccess) {
 599                     $lastaccess = format_time(time() - $student->lastaccess, $datestring);
 600                 } else {
 601                     $lastaccess = $strnever;
 602                 }
 603
 604                 if (empty($student->country)) {
 605                     $country = '';
 606                 }
 607                 else {
 608                     if($countrysort) {
 609                         $country = '('.$student->country.') '.$countries[$student->country];
 610                     }
 611                     else {
 612                         $country = $countries[$student->country];
 613                     }
 614                 }
 615
 616                 $data = array (
 617                         print_user_picture($student->id, $course->id, $student->picture, false, true),
 618                         '<strong><a href="'.$CFG->wwwroot.'/user/view.php?id='.$student->id.'&amp;course='.$course->id.'">'.fullname($student).'</a></strong>');
 619                 if (!isset($hiddenfields['city'])) {
 620                     $data[] = $student->city;
 621                 }
 622                 if (!isset($hiddenfields['country'])) {
 623                     $data[] = $country;
 624                 }
 625                 if (!isset($hiddenfields['lastaccess'])) {
 626                     $data[] = $lastaccess;
 627                 }
 628                 if ($course->enrolperiod) {
 629                     if ($student->timeend) {
 630                         $data[] = userdate($student->timeend, $timeformat);
 631                     } else {
 632                         $data[] = get_string('unlimited');
 633                     }
 634                 }
 635                 if ($isteacher) {
 636                     $data[] = '<input type="checkbox" name="user'.$student->id.'" />';
 637                 }
 638                 $table->add_data($data);
 639
 640             }
 641         }
 642
 643         $table->print_html();
 644
 645     }
 646
 647     if ($isteacher) {
 648         echo '<br /><center>';
 649         echo '<input type="button" onclick="checkall()" value="'.get_string('selectall').'" /> ';
 650         echo '<input type="button" onclick="checknone()" value="'.get_string('deselectall').'" /> ';
 651         $displaylist['messageselect.php'] = get_string('messageselectadd');
 652         if ($course->enrolperiod) {
 653             $displaylist['extendenrol.php'] = get_string('extendenrol');
 654         }
 655         choose_from_menu ($displaylist, "formaction", "", get_string("withselectedusers"), "if(checksubmit(this.form))this.form.submit();", "");
 656         helpbutton("participantswithselectedusers", get_string("withselectedusers"));
 657         echo '<input type="submit" value="' . get_string('ok') . '"';
 658         echo '</center></form>';
 659     }
 660
 661     if ($isteacher && $totalcount > ($perpage*3)) {
 662         echo '<form action="index.php"><p align="center"><input type="hidden" name="id" value="'.$course->id.'" />'.get_string('search').':&nbsp;'."\n";
 663         echo '<input type="text" name="search" value="'.$search.'" />&nbsp;<input type="submit" value="'.get_string('search').'" /></p></form>'."\n";
 664     }
 665
 666     if ($perpage == 99999) {
 667         echo '<div id="showall"><a href="'.$baseurl.'&amp;perpage='.DEFAULT_PAGE_SIZE.'">'.get_string('showperpage', '', DEFAULT_PAGE_SIZE).'</a></div>';
 668     }
 669     else if ($matchcount > 0 && $perpage < $matchcount) {
 670         echo '<div id="showall"><a href="'.$baseurl.'&amp;perpage=99999">'.get_string('showall', '', $matchcount).'</a></div>';
 671     }
 672
 673     print_footer($course);
 674
 675
 676 function get_lastaccess_sql($accesssince='') {
 677     if (empty($accesssince)) {
 678         return '';
 679     }
 680     if ($accesssince == -1) { // never
 681         return ' AND timeaccess = 0';
 682     } else {
 683         return ' AND timeaccess != 0 AND timeaccess < '.$accesssince;
 684     }
 685 }
 686
 687 ?>