add_site_option( string $option, mixed $value )

Adds a new option for the current network.

Description Description

Existing options will not be updated. Note that prior to 3.3 this wasn’t the case.

See also See also

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Parameters Parameters


(string) (Required) Name of the option to add. Expected to not be SQL-escaped.


(mixed) (Required) Option value, can be anything. Expected to not be SQL-escaped.

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Return Return

(bool) True if the option was added, false otherwise.

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More Information More Information

This function essentially the same as add_option() but works network wide when using WP Multisite.

The only major difference is that on multisite site-wide options will not autoload and on a single site the option will autoload. Unlike when using add_option() on a single site, the feature cannot be overridden.

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Source Source

File: wp-includes/option.php

function add_site_option( $option, $value ) {
	return add_network_option( null, $option, $value );

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Changelog Changelog

Version Description
4.4.0 Modified into wrapper for add_network_option()
2.8.0 Introduced.

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User Contributed Notes User Contributed Notes

  1. Skip to note 1 content
    Contributed by MakeWebBetter

    Install the option defaults

     	if ( 1 == $wpmu ) {
             if ( ! get_site_option( 'wporg_lead_options' ) ) {
                 add_site_option( 'wporg_lead_options', $wporg_lead_options_defaults, '', 'yes' );
    	} else {
             if ( ! get_option( 'wporg_lead_options' ) ) {
                 add_option( 'wporg_lead_options', $wporg_lead_options_defaults, '', 'yes' );
  2. Skip to note 2 content
    Contributed by Codex


    Default usage:

    add_site_option( 'my_option', 'my_value' );

    Behavior if the option already exists:

    echo get_site_option( 'i_exist_already' );
    // Output: 'some_value'
    if ( add_site_option( 'i_exist_already', 'new_value' ) ) {
       echo get_site_option( 'i_exist_already' );
    } else {
       echo __( 'Already exists', 'textdomain' );

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