These are functions which can be used from within plugins' files.

This function is used to register plugin in Instant Update's Plugin System (further: IUPS). It accepts two arguments, first is Plugin ID, which is actually file name of main plugin file, and second is array of plugin data.

Exists from version: 3.0

//set plugin id as file name of plugin
$plugin_id = basename(__FILE__);
 
//some plugin data
$data['name'] = "IU Footer ad";
$data['description'] = "Advertise Instant Update in the footer of your website.";
$data['author'] = "Instant Update team";
$data['url'] = "http://www.instant-update.com/";
 
//register plugin to IUPS
if (function_exists('register_plugin')) {
	register_plugin($plugin_id, $data);
}

This function is used to attach plugin function to IUPS. It accepts two arguments, first is hook name and second is name of the function you want to attach to the hook.

Exists from version: 3.0

if (function_exists('add_hook')) {
	add_hook('iu_page_footer','iufooterad_add2footer');
	add_hook('below_dashboard','iufooterad_add2dash');
}

Function to add navigation menu item to the automatically generated menus. All items added via this function will be added right before last menu item added by Instant Update's automatic menus.

This function can be used only in plugin functions which are attached to following hooks: iu_navigation_menu

Exists from version: 3.0

function nav_link() {
	add_menu_item("Google", "http://www.google.com/");
}

Function to add navigation menu item to the menus used in Instant Update administration.

This function can be used only in plugin functions which are attached to following hooks: below_dashboard, above_dashboard, main_nav

Exists from version: 3.0

function iufooterad_add2dash() {
	if (iu_is_admin()) {
		add_menu_item("Configure footer Ad", "plugins/iu-footer/iu-footer-config.php", IU_LINK_POPUP, "Footer AD administration", 500, 450);
	}
}

This function accepts no arguments and returns TRUE or FALSE if currently logged in user is administrator user or not, respectively.

Exists from version: 3.0

NONE

function iufooterad_add2dash() {
	if (iu_is_admin()) {
		add_menu_item("Configure footer Ad", "plugins/iu-footer/iu-footer-config.php", IU_LINK_POPUP, "Footer AD administration", 500, 450);
	}
}

This function accepts no arguments and returns TRUE or FALSE if current web site visitor is logged in into Instant Update administration panel or not, respectively.

Exists from version: 3.0

NONE

function plugin_function() {
	if (iu_is_loggedin()) {
		echo "You are logged in :)";
	}
	else {
		echo "You are not logged in :(";
	}
}

This function returns value of a setting in MySQL database. If there is no such setting in MySQL database, it'll return FALSE.

Exists from version: 3.0

if (!GetSettingsValue('iu_footer_url')) { $iu_footer_url = 'http://www.instant-update.com/'; }
else { $iu_footer_url = GetSettingsValue('iu_footer_url'); }

This function removes a setting in MySQL database. If there is no such setting in MySQL database, it'll return FALSE.

Exists from version: 3.0

if (isset($_GET['uninstall']) && iu_is_admin()) {
	RemoveSetting('iu_footer_url');
	RemoveSetting('iu_footer_image_alt');
	RemoveSetting('iu_footer_image');
	RemoveSetting('iu_footer_image_align');
	RemoveSetting('iu_footer_image_target');
	RemoveSetting('iu_footer_active');
	die("<p>IU footer Ad data removed! Now you can remove folder iu-footer from your plugins directory!</p>");
}

This function updates setting value in MySQL database. If there is no such setting in MySQL database, it'll create it.

Exists from version: 3.0

if (GetSettingsValue('iu_footer_image_target') == false) {
	WriteSettingsValue('iu_footer_image_target', '_blank','select','_blank|_self|_top');
}

This function returns HTML code of HTML form field based on setting type in MySQL database.

Exists from version: 3.0

echo CreateSettingFormField('iu_footer_active','<br />');