Notice: is_plugin_page is deprecated since version 3.1 with no alternative available.
Returns true when the current request is for a plugin page in the administration panel. For example, if the request is for "http://www.example.com/wp-admin/edit.php?page=some_plugin.php", this will return true.
As of version 2.6, this appears to key off of the "page" URL parameter and is based on the variable $plugin_page, set in wp-admin/admin.php.
<?php is_plugin_page(); ?>
is_plugin_page() is located in
As of version 2.6, this is defined in