Codex

Plugin API/Action Reference/admin init

Description

admin_init is triggered before any other hook when a user access the admin area. This hook doesn't provide any parameters and only callback a specified function.

Example

Let's have a look at an example: 

add_action('admin_init', 'restrict_admin', 1);

function restrict_admin(){
	global $current_user;
	get_currentuserinfo();

	if ($current_user->user_level <  8) { //if not admin, die with message
		wp_die( __('You are not allowed to access this part of the site') );
	}
}

In this example we block access to the admin panel for user that are not in the admin group.

Retrieved from "http://codex.wordpress.org/Plugin_API/Action_Reference/admin_init"

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