apply_filters( 'mce_external_plugins', array $external_plugins )

Description

The filter takes an associative array of external plugins for TinyMCE in the form ‘plugin_name’ => ‘url’.

The url should be absolute, and should include the js filename to be loaded. For example: ‘myplugin’ => ‘http://mysite.com/wp-content/plugins/myfolder/mce_plugin.js‘.

If the external plugin adds a button, it should be added with one of the ‘mce_buttons’ filters.