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<?php |
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/** |
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* Implements Special:Activeusers |
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* |
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* Copyright © 2008 Aaron Schulz |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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* @ingroup SpecialPage |
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*/ |
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/** |
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* Implements Special:Activeusers |
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* |
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* @ingroup SpecialPage |
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*/ |
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class SpecialActiveUsers extends SpecialPage { |
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/** |
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* Constructor |
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*/ |
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public function __construct() { |
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parent::__construct( 'Activeusers' ); |
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} |
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/** |
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* Show the special page |
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* |
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* @param string $par Parameter passed to the page or null |
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*/ |
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public function execute( $par ) { |
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$out = $this->getOutput(); |
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$this->setHeaders(); |
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$this->outputHeader(); |
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$opts = new FormOptions(); |
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$opts->add( 'username', '' ); |
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$opts->add( 'groups', [] ); |
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$opts->fetchValuesFromRequest( $this->getRequest() ); |
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if ( $par !== null ) { |
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$opts->setValue( 'username', $par ); |
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} |
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$pager = new ActiveUsersPager( $this->getContext(), $opts ); |
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$usersBody = $pager->getBody(); |
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$this->buildForm(); |
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if ( $usersBody ) { |
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$out->addHTML( |
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$pager->getNavigationBar() . |
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Html::rawElement( 'ul', [], $usersBody ) . |
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$pager->getNavigationBar() |
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); |
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} else { |
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$out->addWikiMsg( 'activeusers-noresult' ); |
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} |
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} |
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/** |
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* Generate and output the form |
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*/ |
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protected function buildForm() { |
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$groups = User::getAllGroups(); |
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foreach ( $groups as $group ) { |
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$msg = User::getGroupName( $group ); |
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$options[$msg] = $group; |
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} |
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$formDescriptor = [ |
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'username' => [ |
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'type' => 'user', |
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'name' => 'username', |
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'label-message' => 'activeusers-from', |
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], |
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'groups' => [ |
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'type' => 'multiselect', |
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'dropdown' => true, |
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'flatlist' => true, |
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'name' => 'groups', |
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'label-message' => 'activeusers-groups', |
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'options' => $options, |
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], |
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]; |
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HTMLForm::factory( 'ooui', $formDescriptor, $this->getContext() ) |
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// For the 'multiselect' field values to be preserved on submit |
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->setFormIdentifier( 'specialactiveusers' ) |
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->setIntro( $this->getIntroText() ) |
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->setWrapperLegendMsg( 'activeusers' ) |
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->setSubmitTextMsg( 'activeusers-submit' ) |
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// prevent setting subpage and 'username' parameter at the same time |
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->setAction( $this->getPageTitle()->getLocalURL() ) |
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->setMethod( 'get' ) |
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->prepareForm() |
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->displayForm( false ); |
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} |
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/** |
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* Return introductory message. |
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* @return string |
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*/ |
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protected function getIntroText() { |
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$days = $this->getConfig()->get( 'ActiveUserDays' ); |
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$intro = $this->msg( 'activeusers-intro' )->numParams( $days )->parse(); |
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// Mention the level of cache staleness... |
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$dbr = wfGetDB( DB_REPLICA, 'recentchanges' ); |
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$rcMax = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', '', __METHOD__ ); |
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if ( $rcMax ) { |
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$cTime = $dbr->selectField( 'querycache_info', |
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'qci_timestamp', |
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[ 'qci_type' => 'activeusers' ], |
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__METHOD__ |
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); |
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if ( $cTime ) { |
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$secondsOld = wfTimestamp( TS_UNIX, $rcMax ) - wfTimestamp( TS_UNIX, $cTime ); |
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} else { |
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$rcMin = $dbr->selectField( 'recentchanges', 'MIN(rc_timestamp)' ); |
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$secondsOld = time() - wfTimestamp( TS_UNIX, $rcMin ); |
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} |
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if ( $secondsOld > 0 ) { |
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$intro .= $this->msg( 'cachedspecial-viewing-cached-ttl' ) |
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->durationParams( $secondsOld )->parseAsBlock(); |
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} |
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} |
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return $intro; |
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} |
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protected function getGroupName() { |
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return 'users'; |
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} |
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} |
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Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArray
is initialized the first time when the foreach loop is entered. You can also see that the value of thebar
key is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.