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Plugin API/Action Reference/ network admin menu

This action could be used to modify the menu in the network admin panel. It runs before the basic network admin panel menu structure is complete. It is more usual to use the network_admin_menu action to modify the menu after it is complete.

Usage

<?php add_action('_network_admin_menu', 'function_name'); ?>

where "function_name" is the name of the function to be called.