site_option_(option) filter-hookWP 3.0.0

Filters the value of an existing network option.

The dynamic portion of the hook name, $option, refers to the option name.


add_filter( 'site_option_(option)', 'wp_kama_site_option_filter', 10, 3 );

 * Function for `site_option_(option)` filter-hook.
 * @param mixed  $value      Value of network option.
 * @param string $option     Option name.
 * @param int    $network_id ID of the network.
 * @return mixed
function wp_kama_site_option_filter( $value, $option, $network_id ){

	// filter...
	return $value;
Value of network option.
Option name.
ID of the network.


Since 3.0.0 Introduced.
Since 2.9.0 As 'site_option_' . $key
Since 4.4.0 The $option parameter was added.
Since 4.7.0 The $network_id parameter was added.

Where the hook is called

wp-includes/option.php 1854
return apply_filters( "site_option_{$option}", $value, $option, $network_id );

Where the hook is used in WordPress

wp-includes/ms-default-filters.php 21
add_filter( 'site_option_welcome_user_email', 'welcome_user_msg_filter' );
wp-includes/ms-functions.php 2341
remove_filter( 'site_option_welcome_user_email', 'welcome_user_msg_filter' );