roundcubemail/program/lib/Roundcube/rcube_plugin_api.php
public function load_plugin($plugin_name, $force = false, $require = true)
    {
        static $plugins_dir;

        if (!$plugins_dir) {
            $dir         = dir($this->dir);
            $plugins_dir = unslashify($dir->path);
        }

        // plugin already loaded?
        if (!$this->plugins[$plugin_name]) {
            $fn = "$plugins_dir/$plugin_name/$plugin_name.php";

            if (!is_readable($fn)) {
                if ($require) {
                    rcube::raise_error(array('code' => 520, 'type' => 'php',
                        'file' => __FILE__, 'line' => __LINE__,
                        'message' => "Failed to load plugin file $fn"), true, false);
                }

                return false;
            }

            if (!class_exists($plugin_name, false)) {
                include $fn;
            }

            // instantiate class if exists
            if (!class_exists($plugin_name, false)) {
                rcube::raise_error(array('code' => 520, 'type' => 'php',
                    'file' => __FILE__, 'line' => __LINE__,
                    'message' => "No plugin class $plugin_name found in $fn"),
                    true, false);

                return false;
            }

            $plugin = new $plugin_name($this);
            $this->active_plugins[] = $plugin_name;

            // check inheritance...
            if (is_subclass_of($plugin, 'rcube_plugin')) {
                // call onload method on plugin if it exists.
                // this is useful if you want to be called early in the boot process
                if (method_exists($plugin, 'onload')) {
                    $plugin->onload();
                }

                if (!empty($plugin->allowed_prefs)) {
                    $this->allowed_prefs = array_merge($this->allowed_prefs, $plugin->allowed_prefs);
                }

                $this->plugins[$plugin_name] = $plugin;
            }
        }

        if ($plugin = $this->plugins[$plugin_name]) {
            // init a plugin only if $force is set or if we're called after initialization
            if (($force || $this->initialized) && !$this->plugins_initialized[$plugin_name] && ($force || !$this->filter($plugin))) {
                $plugin->init();
                $this->plugins_initialized[$plugin_name] = $plugin;
            }
        }

        return true;
    }
public function load_plugin($plugin_name, $force = false, $require = true)
    {
        static $plugins_dir;

        if (!$plugins_dir) {
            $dir         = dir($this->dir);
            $plugins_dir = unslashify($dir->path);
        }

        // plugin already loaded?
        if (!$this->plugins[$plugin_name]) {
            $fn = "$plugins_dir/$plugin_name/$plugin_name.php";

            if (!is_readable($fn)) {
                if ($require) {
                    rcube::raise_error(array('code' => 520, 'type' => 'php',
                        'file' => __FILE__, 'line' => __LINE__,
                        'message' => "Failed to load plugin file $fn"), true, false);
                }

                return false;
            }

            if (!class_exists($plugin_name, false)) {
                include $fn;
            }

            // instantiate class if exists
            if (!class_exists($plugin_name, false)) {
                rcube::raise_error(array('code' => 520, 'type' => 'php',
                    'file' => __FILE__, 'line' => __LINE__,
                    'message' => "No plugin class $plugin_name found in $fn"),
                    true, false);

                return false;
            }

            $plugin = new $plugin_name($this);
            $this->active_plugins[] = $plugin_name;

            // check inheritance...
            if (is_subclass_of($plugin, 'rcube_plugin')) {
                // call onload method on plugin if it exists.
                // this is useful if you want to be called early in the boot process
                if (method_exists($plugin, 'onload')) {
                    $plugin->onload();
                }

                if (!empty($plugin->allowed_prefs)) {
                    $this->allowed_prefs = array_merge($this->allowed_prefs, $plugin->allowed_prefs);
                }

                $this->plugins[$plugin_name] = $plugin;
            }
        }

        if ($plugin = $this->plugins[$plugin_name]) {
            // init a plugin only if $force is set or if we're called after initialization
            if (($force || $this->initialized) && !$this->plugins_initialized[$plugin_name] && ($force || !$this->filter($plugin))) {
                $plugin->init();
                $this->plugins_initialized[$plugin_name] = $plugin;
            }
        }

        return true;
    }
public function load_plugin ( $ plugin_name , $ force = false , $ require = true ) { static $ plugins_dir ; if ( ! $ plugins_dir ) { $ dir = dir ( $ this -> dir ) ; $ plugins_dir = unslashify ( $ dir -> path ) ; } // plugin already loaded? if ( ! $ this -> plugins [ $ plugin_name ] ) { $ fn = "$plugins_dir/$plugin_name/$plugin_name.php" ; if ( ! is_readable ( $ fn ) ) { if ( $ require ) { rcube :: raise_error ( array ( 'code' => 520 , 'type' => 'php' , 'file' => __FILE__ , 'line' => __LINE__ , 'message' => "Failed to load plugin file $fn" ) , true , false ) ; } return false ; } if ( ! class_exists ( $ plugin_name , false ) ) { include $ fn ; } // instantiate class if exists if ( ! class_exists ( $ plugin_name , false ) ) { rcube :: raise_error ( array ( 'code' => 520 , 'type' => 'php' , 'file' => __FILE__ , 'line' => __LINE__ , 'message' => "No plugin class $plugin_name found in $fn" ) , true , false ) ; return false ; } $ plugin = new $ plugin_name ( $ this ) ; $ this -> active_plugins [ ] = $ plugin_name ; // check inheritance... if ( is_subclass_of ( $ plugin , 'rcube_plugin' ) ) { // call onload method on plugin if it exists. // this is useful if you want to be called early in the boot process if ( method_exists ( $ plugin , 'onload' ) ) { $ plugin -> onload ( ) ; } if ( ! empty ( $ plugin -> allowed_prefs ) ) { $ this -> allowed_prefs = array_merge ( $ this -> allowed_prefs , $ plugin -> allowed_prefs ) ; } $ this -> plugins [ $ plugin_name ] = $ plugin ; } } if ( $ plugin = $ this -> plugins [ $ plugin_name ] ) { // init a plugin only if $force is set or if we're called after initialization if ( ( $ force || $ this -> initialized ) && ! $ this -> plugins_initialized [ $ plugin_name ] && ( $ force || ! $ this -> filter ( $ plugin ) ) ) { $ plugin -> init ( ) ; $ this -> plugins_initialized [ $ plugin_name ] = $ plugin ; } } return true ; }
Load the specified plugin

@param string  Plugin name
@param boolean Force loading of the plugin even if it doesn't match the filter
@param boolean Require loading of the plugin, error if it doesn't exist

@return boolean True on success, false if not loaded or failure
Load the specified plugin