src/Zend/Loader/PluginLoader.php
public function isLoaded($name)
    {
        $name = $this->_formatName($name);
        if ($this->_useStaticRegistry) {
            return isset(self::$_staticLoadedPlugins[$this->_useStaticRegistry][$name]);
        }

        return isset($this->_loadedPlugins[$name]);
    }
public function isLoaded($name)
    {
        $name = $this->_formatName($name);
        if ($this->_useStaticRegistry) {
            return isset(self::$_staticLoadedPlugins[$this->_useStaticRegistry][$name]);
        }

        return isset($this->_loadedPlugins[$name]);
    }
public function isLoaded ( $ name ) { $ name = $ this -> _formatName ( $ name ) ; if ( $ this -> _useStaticRegistry ) { return isset ( self :: $ _staticLoadedPlugins [ $ this -> _useStaticRegistry ] [ $ name ] ) ; } return isset ( $ this -> _loadedPlugins [ $ name ] ) ; }
Whether or not a Plugin by a specific name is loaded

@param string $name
@return Zend_Loader_PluginLoader
Whether or not a Plugin by a specific name is loaded