Создание произвольного плагина
Вызов системных событий, собственная группа плагинов
рейтинг: 7.3/10, голосов: 23
Плагины можно применять не только для обработки системных событий, но и просто для расширения функционала собственного компонента - что-то вроде расширений к расширениям.
Эта статья поможет вам лучше понять, что необходимо сделать чтобы получить собственный плагин. Большинство из них состоят только из одного файла, который несет в себе сам код. Но для правильной установки и работы необходимо добавить еще XML-файл, который будет описывать процесс установки, мета данные и параметры.
Создание установочного файла
Как и для любых других расширений Joomla, установочный файл - это архив *.zip или *.tar.gz. В любом случае в архиве должен быть валидный XML, иначе установка будет не возможна. Ниже можно увидеть пример этого файла для поискового плагина
<?xml version="1.0" encoding="iso-8859-1"?>
<install version="1.5" type="plugin" method="upgrade" group="search">
<name>Categories searchbot</name>
<author>Joomla! Project</author>
<creationDate>November 2005</creationDate>
<copyright>(C) 2005 Open Source Matters. All rights reserved.</copyright>
<license>GNU/GPL</license>
<authorEmail>admin@joomla.org</authorEmail>
<authorUrl>www.joomla.org</authorUrl>
<version>1.1</version>
<description>Allows searching of Categories information</description>
<files>
<filename plugin="categories.searchbot">categories.searchbot.php</filename>
</files>
<params>
<param name="search_limit" type="text" size="5" default="50" label="Search Limit" description="Number of search items to return"/>
</params>
</install>
К важным моментам тут относятся
- group="search"
Группа к которой принадлежит плагин. Она совпадает с названием директории, где будет располагаться файл. Например для поисковых плагинов будет использовать "<siteroot>/plugins/search".
- <files><filename></filename></files>
Список файлов, которые будут скопированы при установке.
- <params>
Параметры, который будут доступны при настройке плагина.
- method="upgrade"
Параметр в теге <install> явно указывает что при установке не нужно удалять старые файлы, а только переписать их новыми из архива.
Остальные свойства очевидны.
Стоит заметить, что ваш плагин должен содержать только уникальные функции и классы, чтобы избежать конфликтов с другими частями системы.
Если ваш плагин не использует функционал из существующих категорий, то укажите собственную группу. Во избежание ошибок, перед установкой, создайте необходимую категорию, например так
<siteroot>/plugins/mypuginsИсполняемый код
Joomla использует для реализации паттерн Наблюдатель (Observer). Лучше придерживаться именно такой реализации.
// запрет прямого доступа
defined( '_JEXEC' ) or die( 'Restricted access' );
// Импортируем зависимую библиотеку
jimport('joomla.plugin.plugin');
class plg<PluginGroup><PluginName> extends JPlugin
{
/**
* Конструктор класса
*/
function plg<PluginGroup><PluginName>( &$subject )
{
// обязательно необходимо вызвать родительский конструктор
parent::__construct( $subject );
// загрузка параметров плагина
$this->_plugin = JPluginHelper::getPlugin( '<GroupName>', '<PluginName>' );
$this->_params = new JParameter( $this->_plugin->params );
}
/**
* Методы плагина - это события, которые будут вызываться автоматически.
*/
function <EventName>()
{
// Код плагина
return true;
}
}
Используем плагин в своем коде
После того как вы создали свой плагин, вероятно вы захотите использовать его в вашем коде, например, в компоненте. Обычно это необходимо, только если вы используете нестандартные категории плагинов. Остальные будут вызываться автоматически на определенные события системы и явный вызов к ним нет необходимости писать.
Произвольный вызов события плагинов выглядит следующим образом
JPluginHelper::importPlugin('<PluginGroup>');
$dispatcher =& JDispatcher::getInstance();
$results = $dispatcher->trigger( '<EventName>', <ParameterArray> );
Массив параметров отправлять не обязательно. После выполнения этого кода, все активные плагины выбираются из общего списка, выстраиваются в порядке приоритета (он выбирается в панели управления, Менеджер плагинов, столбец "порядок") и в каждом из них вызывается метод имя которого совпадает с названием события. Метод в виде аргументов получит массив <ParameterArray>, каждый элемент которого будет новым аргументом.
Используем плагин в своем коде/
А вот как можно использовать плагин, действие плагина способом вставки в код определенной команды, типа: {имя_плагина} ???
Есть RUководство как это реализовывается?
Получаем текст документа и в нем str_replace или preg_replace
Блин. Начинающему прям понятно всё стало! )))
Ну конечно же! А я то думаю откуда ветер дует и куда он так спешит. А оно то оказалось! В сторону правой коленки южно-американского дерева дуб кленового соцветия preg_replace! Всё пойду сдаваться санитарам! =))))
Не запускается и все тут. В чем отличия создания плагинов к joomla 2.5?
читал, но ни чего не понял, помогите
function plg<PluginGroup><PluginName>( &$subject )
1) не понял откуда берется значение $subject?
2) как плагин знает когда ему сработать?
В общем потребовалось поработать с этим мамонтом версии 1.5
Конкретно по статье: КГ/АМ
Ничего не написано конкретного, на других сайтах есть гораздо более подробные инструкции.
Я научился делать плагины для Joomla 3 и сейчас продаю несколько плагинов , благодаря курсу "Создание расширений для Joomla скачал его здесь infosklad.org/threads/webformyself-joomla-professional-sozdanie-rasshirenij-dlja-joomla.16397/ очень рекомендую кто хочет заниматься разработкой плагинов и дополнений
Нашел видео-курс этого автора на торренте, бесплатно.
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