blog/lib.php

   1 <?php //$Id$
   2
   3     /**
   4      * Library of functions and constants for blog
   5      */
   6     require_once($CFG->libdir .'/blocklib.php');
   7     require_once($CFG->libdir .'/pagelib.php');
   8     require_once($CFG->dirroot .'/blog/rsslib.php');
   9     require_once($CFG->dirroot .'/blog/blogpage.php');
  10
  11
  12     /**
  13      * Definition of blogcourse page type (blog page with course id present).
  14      */
  15     //not used at the moment, and may not need to be
  16     define('PAGE_BLOG_COURSE_VIEW', 'blog_course-view');
  17
  18
  19     /**
  20      * Checks to see if user has visited blogpages before, if not, install 2
  21      * default blocks (blog_menu and blog_tags).
  22      */
  23     function blog_check_and_install_blocks() {
  24         global $USER;
  25         if (isloggedin() && !isguest()) {
  26             // if this user has not visited this page before
  27             if (!get_user_preferences('blogpagesize')) {
  28                 // find the correct ids for blog_menu and blog_from blocks
  29                 $menublock = get_record('block','name','blog_menu');
  30                 $tagsblock = get_record('block','name','blog_tags');
  31                 // add those 2 into block_instance page
  32
  33                 // add blog_menu block
  34                 $newblock = new object();
  35                 $newblock -> blockid  = $menublock->id;
  36                 $newblock -> pageid   = $USER->id;
  37                 $newblock -> pagetype = 'blog-view';
  38                 $newblock -> position = 'r';
  39                 $newblock -> weight   = 0;
  40                 $newblock -> visible  = 1;
  41                 insert_record('block_instance', $newblock);
  42
  43                 // add blog_tags menu
  44                 $newblock -> blockid = $tagsblock->id;
  45                 $newblock -> weight  = 1;
  46                 insert_record('block_instance', $newblock);
  47
  48                 // finally we set the page size pref
  49                 set_user_preference('blogpagesize', 10);
  50             }
  51         }
  52     }
  53
  54
  55     /**
  56      * Adaptation of isediting in moodlelib.php for blog module
  57      * @return bool
  58      */
  59     function blog_isediting() {
  60         global $SESSION;
  61
  62         return !empty($SESSION->blog_editing_enabled);
  63     }
  64
  65
  66     /**
  67      *  This function is in lib and not in BlogInfo because entries being searched
  68      *   might be found in any number of blogs rather than just one.
  69      *
  70      *   $@param ...
  71      */
  72     function blog_print_html_formatted_entries($postid, $filtertype, $filterselect, $tagid, $tag) {
  73
  74         global $CFG, $USER;
  75
  76         $blogpage  = optional_param('blogpage', 0, PARAM_INT);
  77         $bloglimit = optional_param('limit', get_user_preferences('blogpagesize', 10), PARAM_INT);
  78         $start     = $blogpage * $bloglimit;
  79
  80         $sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
  81
  82         $morelink = '<br />&nbsp;&nbsp;';
  83
  84         $totalentries = get_viewable_entry_count($postid, $bloglimit, $start, $filtertype, $filterselect, $tagid, $tag, $sort='lastmodified DESC');
  85         $blogEntries = fetch_entries($postid, $bloglimit, $start, $filtertype, $filterselect, $tagid, $tag, $sort='lastmodified DESC', true);
  86
  87         print_paging_bar($totalentries, $blogpage, $bloglimit, get_baseurl($filtertype, $filterselect), 'blogpage');
  88
  89         if ($CFG->enablerssfeeds) {
  90             blog_rss_print_link($filtertype, $filterselect, $tag);
  91         }
  92
  93         if (has_capability('moodle/blog:create', $sitecontext)) {
  94             //the user's blog is enabled and they are viewing their own blog
  95             $addlink = '<div class="addbloglink">';
  96             $addlink .= '<a href="'.$CFG->wwwroot .'/blog/edit.php?action=add'.'">'. get_string('addnewentry', 'blog').'</a>';
  97             $addlink .= '</div>';
  98             echo $addlink;
  99         }
 100
 101         if ($blogEntries) {
 102
 103             $count = 0;
 104             foreach ($blogEntries as $blogEntry) {
 105                 blog_print_entry($blogEntry, 'list', $filtertype, $filterselect); //print this entry.
 106                 $count++;
 107             }
 108
 109             print_paging_bar($totalentries, $blogpage, $bloglimit, get_baseurl($filtertype, $filterselect), 'blogpage');
 110
 111             if (!$count) {
 112                 print '<br /><div style="text-align:center">'. get_string('noentriesyet', 'blog') .'</div><br />';
 113
 114             }
 115
 116             print $morelink.'<br />'."\n";
 117             return;
 118         }
 119
 120         $output = '<br /><div style="text-align:center">'. get_string('noentriesyet', 'blog') .'</div><br />';
 121
 122         print $output;
 123
 124     }
 125
 126
 127     /**
 128      * This function is in lib and not in BlogInfo because entries being searched
 129      * might be found in any number of blogs rather than just one.
 130      *
 131      * This function builds an array which can be used by the included
 132      * template file, making predefined and nicely formatted variables available
 133      * to the template. Template creators will not need to become intimate
 134      * with the internal objects and vars of moodle blog nor will they need to worry
 135      * about properly formatting their data
 136      *
 137      *   @param BlogEntry blogEntry - a hopefully fully populated BlogEntry object
 138      *   @param string viewtype Default is 'full'. If 'full' then display this blog entry
 139      *     in its complete form (eg. archive page). If anything other than 'full'
 140      *     display the entry in its abbreviated format (eg. index page)
 141      */
 142     function blog_print_entry($blogEntry, $viewtype='full', $filtertype='', $filterselect='', $mode='loud') {
 143
 144         global $USER, $CFG, $COURSE, $ME;
 145
 146         $template['body'] = format_text($blogEntry->summary, $blogEntry->format);
 147         //$template['title'] = '<a name="'. $blogEntry->subject .'"></a>';
 148         //enclose the title in nolink tags so that moodle formatting doesn't autolink the text
 149         $template['title'] = '<span class="nolink">'.$blogEntry->subject.'</span>';
 150         $template['userid'] = $blogEntry->userid;
 151         $template['author'] = fullname(get_record('user','id',$blogEntry->userid));
 152         $template['lastmod'] = userdate($blogEntry->lastmodified);
 153         $template['created'] = userdate($blogEntry->created);
 154         $template['publishstate'] = $blogEntry->publishstate;
 155
 156         /// preventing user to browse blogs that they aren't supposed to see
 157         /// This might not be too good since there are multiple calls per page
 158
 159         /*
 160         if (!blog_user_can_view_user_post($template['userid'])) {
 161             error ('you can not view this post');
 162         }*/
 163
 164         $stredit = get_string('edit');
 165         $strdelete = get_string('delete');
 166
 167         $user = get_record('user','id',$template['userid']);
 168
 169         /// Start printing of the blog
 170
 171         echo '<table cellspacing="0" class="forumpost blogpost blog'.$template['publishstate'].'" width="100%">';
 172
 173         echo '<tr class="header"><td class="picture left">';
 174         print_user_picture($template['userid'], SITEID, $user->picture);
 175         echo '</td>';
 176
 177         echo '<td class="topic starter"><div class="subject">'.$template['title'].'</div><div class="author">';
 178         $fullname = fullname($user, $template['userid']);
 179         $by = new object();
 180         $by->name =  '<a href="'.$CFG->wwwroot.'/user/view.php?id='.
 181                     $user->id.'&amp;course='.$COURSE->id.'">'.$fullname.'</a>';
 182         $by->date = $template['lastmod'];
 183         print_string('bynameondate', 'forum', $by);
 184         echo '</div></td></tr>';
 185
 186         echo '<tr><td class="left side">';
 187
 188     /// Actual content
 189
 190         echo '</td><td class="content">'."\n";
 191
 192         if ($blogEntry->attachment) {
 193             echo '<div class="attachments">';
 194             $attachedimages = blog_print_attachments($blogEntry);
 195             echo '</div>';
 196         } else {
 197             $attachedimages = '';
 198         }
 199
 200         switch ($template['publishstate']) {
 201             case 'draft':
 202                 $blogtype = get_string('publishtonoone', 'blog');
 203             break;
 204             case 'site':
 205                 $blogtype = get_string('publishtosite', 'blog');
 206             break;
 207             case 'public':
 208                 $blogtype = get_string('publishtoworld', 'blog');
 209             break;
 210             default:
 211                 $blogtype = '';
 212             break;
 213
 214         }
 215
 216         echo '<div class="audience">'.$blogtype.'</div>';
 217
 218         // Print whole message
 219         echo format_text($template['body']);
 220
 221         /// Print attachments
 222         echo $attachedimages;
 223     /// Links to tags
 224
 225         if ($blogtags = get_records_sql('SELECT t.* FROM '.$CFG->prefix.'tags t, '.$CFG->prefix.'blog_tag_instance ti
 226                                      WHERE t.id = ti.tagid
 227                                      AND ti.entryid = '.$blogEntry->id)) {
 228             echo '<div class="tags">';
 229             if ($blogtags) {
 230                 print_string('tags');
 231                 echo ': ';
 232                 foreach ($blogtags as $key => $blogtag) {
 233                     $taglist[] = '<a href="index.php?filtertype='.$filtertype.'&amp;filterselect='.$filterselect.'&amp;tagid='.$blogtag->id.'">'.$blogtag->text.'</a>';
 234                 }
 235                 echo implode(', ', $taglist);
 236             }
 237             echo '</div>';
 238         }
 239
 240     /// Commands
 241
 242         echo '<div class="commands">';
 243
 244         if (blog_user_can_edit_post($blogEntry)) {
 245             echo '<a href="'.$CFG->wwwroot.'/blog/edit.php?action=edit&amp;id='.$blogEntry->id.'">'.$stredit.'</a>';
 246             echo '| <a href="'.$CFG->wwwroot.'/blog/edit.php?action=delete&amp;id='.$blogEntry->id.'">'.$strdelete.'</a>';
 247         }
 248
 249         echo '</div>';
 250
 251         echo '</td></tr></table>'."\n\n";
 252
 253     }
 254
 255     function blog_file_area_name($blogentry) {
 256     //  Creates a directory file name, suitable for make_upload_directory()
 257         global $CFG;
 258         // $CFG->dataroot/blog/attachments/xxxx/file.jpg
 259         return "blog/attachments/$blogentry->id";
 260     }
 261
 262     function blog_file_area($blogentry) {
 263         return make_upload_directory( blog_file_area_name($blogentry) );
 264     }
 265
 266     function blog_delete_old_attachments($post, $exception="") {
 267     // Deletes all the user files in the attachments area for a post
 268     // EXCEPT for any file named $exception
 269
 270         if ($basedir = blog_file_area($post)) {
 271             if ($files = get_directory_list($basedir)) {
 272                 foreach ($files as $file) {
 273                     if ($file != $exception) {
 274                         unlink("$basedir/$file");
 275                         notify("Existing file '$file' has been deleted!");
 276                     }
 277                 }
 278             }
 279             if (!$exception) {  // Delete directory as well, if empty
 280                 rmdir("$basedir");
 281             }
 282         }
 283     }
 284
 285     function blog_print_attachments($blogentry, $return=NULL) {
 286     // if return=html, then return a html string.
 287     // if return=text, then return a text-only string.
 288     // otherwise, print HTML for non-images, and return image HTML
 289
 290         global $CFG;
 291
 292         $filearea = blog_file_area_name($blogentry);
 293
 294         $imagereturn = "";
 295         $output = "";
 296
 297         if ($basedir = blog_file_area($blogentry)) {
 298             if ($files = get_directory_list($basedir)) {
 299                 $strattachment = get_string("attachment", "forum");
 300                 foreach ($files as $file) {
 301                     include_once($CFG->libdir.'/filelib.php');
 302                     $icon = mimeinfo("icon", $file);
 303                     $type = mimeinfo("type", $file);
 304                     if ($CFG->slasharguments) {
 305                         $ffurl = "$CFG->wwwroot/file.php/$filearea/$file";
 306                     } else {
 307                         $ffurl = "$CFG->wwwroot/file.php?file=/$filearea/$file";
 308                     }
 309                     $image = "<img src=\"$CFG->pixpath/f/$icon\" class=\"icon\" alt=\"\" />";
 310
 311                     if ($return == "html") {
 312                         $output .= "<a href=\"$ffurl\">$image</a> ";
 313                         $output .= "<a href=\"$ffurl\">$file</a><br />";
 314
 315                     } else if ($return == "text") {
 316                         $output .= "$strattachment $file:\n$ffurl\n";
 317
 318                     } else {
 319                         if (in_array($type, array('image/gif', 'image/jpeg', 'image/png'))) {    // Image attachments don't get printed as links
 320                             $imagereturn .= "<br /><img src=\"$ffurl\" alt=\"\" />";
 321                         } else {
 322                             echo "<a href=\"$ffurl\">$image</a> ";
 323                             echo filter_text("<a href=\"$ffurl\">$file</a><br />");
 324                         }
 325                     }
 326                 }
 327             }
 328         }
 329
 330         if ($return) {
 331             return $output;
 332         }
 333
 334         return $imagereturn;
 335     }
 336
 337
 338     /**
 339      * Use this function to retrieve a list of publish states available for
 340      * the currently logged in user.
 341      *
 342      * @return array This function returns an array ideal for sending to moodles'
 343      *                choose_from_menu function.
 344      */
 345     function blog_applicable_publish_states($courseid='') {
 346
 347         global $CFG;
 348
 349         // everyone gets draft access
 350         if ($CFG->bloglevel >= BLOG_USER_LEVEL) {
 351             $options = array ( 'draft' => get_string('publishtonoone', 'blog') );
 352         }
 353
 354         if ($CFG->bloglevel > BLOG_USER_LEVEL) {
 355             $options['site'] = get_string('publishtosite', 'blog');
 356         }
 357
 358         if ($CFG->bloglevel >= BLOG_GLOBAL_LEVEL) {
 359             $options['public'] = get_string('publishtoworld', 'blog');
 360         }
 361
 362         return $options;
 363     }
 364
 365
 366     /**
 367      * User can edit a blog entry if this is their own blog post and they have
 368      * the capability moodle/blog:create, or if they have the capability
 369      * moodle/blog:manageentries.
 370      *
 371      * This also applies to deleting of posts.
 372      */
 373     function blog_user_can_edit_post($blogEntry) {
 374
 375         global $CFG, $USER;
 376
 377         $sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
 378
 379         if (has_capability('moodle/blog:manageentries', $sitecontext)) {
 380             return true; // can edit any blog post
 381         }
 382
 383         if ($blogEntry->userid == $USER->id
 384           and has_capability('moodle/blog:create', $sitecontext)) {
 385             return true; // can edit own when having blog:create capability
 386         }
 387
 388         return false;
 389     }
 390
 391
 392     /**
 393      * Checks to see if a user can view the blogs of another user.
 394      * Only blog level is checked here, the capabilities are enforced
 395      * in blog/index.php
 396      */
 397     function blog_user_can_view_user_post($targetuserid, $blogEntry=null) {
 398         global $CFG, $USER;
 399
 400         if (empty($CFG->bloglevel)) {
 401             return false; // blog system disabled
 402         }
 403
 404         if (!empty($USER->id) and $USER->id == $targetuserid) {
 405             return true; // can view own posts in any case
 406         }
 407
 408         $sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
 409         if (has_capability('moodle/blog:manageentries', $sitecontext)) {
 410             return true; // can manage all posts
 411         }
 412
 413         // coming for 1 post, make sure it's not a draft
 414         if ($blogEntry and $blogEntry->publishstate == 'draft') {
 415             return false;  // can not view draft of others
 416         }
 417
 418         // coming for 1 post, make sure user is logged in, if not a public blog
 419         if ($blogEntry && $blogEntry->publishstate != 'public' && !isloggedin()) {
 420             return false;
 421         }
 422
 423         switch ($CFG->bloglevel) {
 424             case BLOG_GLOBAL_LEVEL:
 425                 return true;
 426             break;
 427
 428             case BLOG_SITE_LEVEL:
 429                 if (!empty($USER->id)) { // not logged in viewers forbidden
 430                     return true;
 431                 }
 432                 return false;
 433             break;
 434
 435             case BLOG_COURSE_LEVEL:
 436                 $mycourses = array_keys(get_my_courses($USER->id));
 437                 $usercourses = array_keys(get_my_courses($targetuserid));
 438                 $shared = array_intersect($mycourses, $usercourses);
 439                 if (!empty($shared)) {
 440                     return true;
 441                 }
 442                 return false;
 443             break;
 444
 445             case BLOG_GROUP_LEVEL:
 446                 $mycourses = array_keys(get_my_courses($USER->id));
 447                 $usercourses = array_keys(get_my_courses($targetuserid));
 448                 $shared = array_intersect($mycourses, $usercourses);
 449                 foreach ($shared as $courseid) {
 450                     $coursecontext = get_context_instance(CONTEXT_COURSE, $courseid);
 451                     if (has_capability('moodle/site:accessallgroups', $coursecontext)
 452                       or groupmode($courseid) != SEPARATEGROUPS) {
 453                         return true;
 454                     } else {
 455                         if ($usergroups = user_group($courseid, $targetuserid)) {
 456                             foreach ($usergroups as $usergroup) {
 457                                 if (ismember($usergroup->id)) {
 458                                     return true;
 459                                 }
 460                             }
 461                         }
 462                     }
 463                 }
 464                 return false;
 465             break;
 466
 467             case BLOG_USER_LEVEL:
 468             default:
 469                 $personalcontext = get_context_instance(CONTEXT_USER, $targetuserid);
 470                 return has_capability('moodle/user:readuserblogs', $personalcontext);
 471             break;
 472
 473         }
 474     }
 475
 476
 477     /**
 478      * Main filter function.
 479      */
 480     function fetch_entries($postid='', $fetchlimit=10, $fetchstart='', $filtertype='', $filterselect='', $tagid='', $tag ='', $sort='lastmodified DESC', $limit=true) {
 481
 482         global $CFG, $USER;
 483
 484         /// the post table will be used for other things too
 485         $typesql = " AND p.module = 'blog' ";
 486
 487         /// set the tag id for searching
 488         if ($tagid) {
 489             $tag = $tagid;
 490         } else if ($tag) {
 491             if ($tagrec = get_record_sql('SELECT * FROM '.$CFG->prefix.'tags WHERE text LIKE "'.$tag.'"')) {
 492                 $tag = $tagrec->id;
 493             } else {
 494                 $tag = -1;    //no records found
 495             }
 496         }
 497
 498         // If we have specified an ID
 499         // Just return 1 entry
 500
 501         if ($postid) {
 502
 503             if ($post = get_record('post', 'id', $postid)) {
 504
 505                 if (blog_user_can_view_user_post($post->userid, $post)) {
 506
 507                     if ($user = get_record('user', 'id', $post->userid)) {
 508                         $post->email = $user->email;
 509                         $post->firstname = $user->firstname;
 510                         $post->lastname = $user->lastname;
 511                     }
 512                     $retarray[] = $post;
 513                     return $retarray;
 514                 } else {
 515                     return null;
 516                 }
 517
 518             } else { // bad postid
 519                 return null;
 520             }
 521         }
 522
 523         if ($tag) {
 524             $tagtablesql = $CFG->prefix.'blog_tag_instance bt, ';
 525             $tagquerysql = ' AND bt.entryid = p.id AND bt.tagid = '.$tag.' ';
 526         } else {
 527             $tagtablesql = '';
 528             $tagquerysql = '';
 529         }
 530
 531         if (isloggedin() && !has_capability('moodle/legacy:guest', get_context_instance(CONTEXT_SYSTEM, SITEID), $USER->id, false)) {
 532             $permissionsql =  'AND (p.publishstate = \'site\' OR p.publishstate = \'public\' OR p.userid = '.$USER->id.')';
 533         } else {
 534             $permissionsql =  'AND p.publishstate = \'public\'';
 535         }
 536
 537         // fix for MDL-9165, use with readuserblogs capability in a user context can read that user's private blogs
 538         // admins can see all blogs regardless of publish states, as described on the help page
 539         if (has_capability('moodle/user:readuserblogs', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
 540             $permissionsql = '';
 541         } else if ($filtertype=='user' && has_capability('moodle/user:readuserblogs', get_context_instance(CONTEXT_USER, $filterselect))) {
 542             $permissionsql = '';
 543         }
 544         /****************************************
 545          * depending on the type, there are 4   *
 546          * different possible sqls              *
 547          ****************************************/
 548
 549         $requiredfields = 'p.*, u.firstname,u.lastname,u.email';
 550
 551         if ($filtertype == 'course' && $filterselect == SITEID) {  // Really a site
 552             $filtertype = 'site';
 553         }
 554
 555         switch ($filtertype) {
 556
 557             case 'site':
 558
 559                 $SQL = 'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
 560                         .$CFG->prefix.'user u
 561                         WHERE p.userid = u.id '.$tagquerysql.'
 562                         AND u.deleted = 0
 563                         '.$permissionsql.$typesql;
 564
 565             break;
 566
 567             case 'course':
 568                 // all users with a role assigned
 569                 $context = get_context_instance(CONTEXT_COURSE, $filterselect);
 570
 571                 $SQL = 'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
 572                         .$CFG->prefix.'role_assignments ra, '.$CFG->prefix.'user u
 573                         WHERE p.userid = ra.userid '.$tagquerysql.'
 574                         AND ra.contextid '.get_related_contexts_string($context).'
 575                         AND u.id = p.userid
 576                         AND u.deleted = 0
 577                         '.$permissionsql.$typesql;
 578
 579             break;
 580
 581             case 'group':
 582
 583                 $SQL = 'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
 584                         .groups_members_from_sql().', '.$CFG->prefix.'user u
 585                         WHERE '.groups_members_where_sql($filterselect, 'p.userid').'
 586                         AND u.id = p.userid
 587                         AND u.deleted = 0
 588                         '.$permissionsql.$typesql;
 589
 590                         /*'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
 591                         .$CFG->prefix.'groups_members m, '.$CFG->prefix.'user u
 592                         WHERE p.userid = m.userid '.$tagquerysql.'
 593                         AND u.id = p.userid
 594                         AND m.groupid = '.$filterselect.'
 595                         AND u.deleted = 0
 596                         AND '.$permissionsql.$typesql;
 597                         '.$permissionsql;
 598                         */
 599             break;
 600
 601             case 'user':
 602
 603                 $SQL = 'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
 604                         .$CFG->prefix.'user u
 605                         WHERE p.userid = u.id '.$tagquerysql.'
 606                         AND u.id = '.$filterselect.'
 607                         AND u.deleted = 0
 608                         '.$permissionsql.$typesql;
 609             break;
 610         }
 611
 612         $limitfrom = 0;
 613         $limitnum = 0;
 614
 615         if ($fetchstart !== '' && $limit) {
 616             $limitfrom = $fetchstart;
 617             $limitnum = $fetchlimit;
 618         }
 619
 620         $orderby = ' ORDER BY '. $sort .' ';
 621
 622         //global $db; $db->debug = true;
 623         $records = get_records_sql($SQL . $orderby, $limitfrom, $limitnum);
 624         //$db->debug = false;
 625
 626         if (empty($records)) {
 627             return array();
 628         }
 629
 630         return $records;
 631     }
 632
 633
 634     /**
 635      * get the count of viewable entries, easiest way is to count fetch_entries
 636      * this is used for print_paging_bar
 637      * this is not ideal, but because of the UNION in the sql in fetch_entries,
 638      * it is hard to use count_records_sql
 639      */
 640     function get_viewable_entry_count($postid='', $fetchlimit=10,
 641                 $fetchstart='', $filtertype='', $filterselect='', $tagid='',
 642                 $tag ='', $sort='lastmodified DESC') {
 643
 644         $blogEntries = fetch_entries($postid, $fetchlimit,
 645                 $fetchstart, $filtertype, $filterselect, $tagid, $tag,
 646                 $sort='lastmodified DESC', false);
 647
 648         return count($blogEntries);
 649     }
 650
 651
 652     /// Find the base url from $_GET variables, for print_paging_bar
 653     function get_baseurl($filtertype, $filterselect) {
 654
 655         $getcopy  = $_GET;
 656
 657         unset($getcopy['blogpage']);
 658
 659         $strippedurl = strip_querystring(qualified_me());
 660         if(!empty($getcopy)) {
 661             $first = false;
 662             $querystring = '';
 663             foreach($getcopy as $var => $val) {
 664                 if(!$first) {
 665                     $first = true;
 666                     if ($var != 'filterselect' && $var != 'filtertype') {
 667                         $querystring .= '?'.$var.'='.$val;
 668                         $hasparam = true;
 669                     } else {
 670                         $querystring .= '?';
 671                     }
 672                 } else {
 673                     if ($var != 'filterselect' && $var != 'filtertype') {
 674                     $querystring .= '&amp;'.$var.'='.$val;
 675                     $hasparam = true;
 676                     }
 677                 }
 678             }
 679             if (isset($hasparam)) {
 680                 $querystring .= '&amp;';
 681             } else {
 682                 $querystring = '?';
 683             }
 684         } else {
 685             $querystring = '?';
 686         }
 687
 688         return strip_querystring(qualified_me()) . $querystring. 'filtertype='.
 689                 $filtertype.'&amp;filterselect='.$filterselect.'&amp;';
 690
 691     }
 692 ?>