update_home_siteurl( string $old_value, string $value )

Flushes rewrite rules if siteurl, home or page_on_front changed.

Parameters

$old_value

(Required)

$value

(Required)

Source

File: wp-admin/includes/misc.php 

function update_home_siteurl( $old_value, $value ) {
	if ( wp_installing() )
		return;

	if ( is_multisite() && ms_is_switched() ) {
		delete_option( 'rewrite_rules' );
	} else {
		flush_rewrite_rules();
	}
}

Expand Source Code View on GitHub

Related

Uses

Uses
Uses Description
wp-includes/ms-blogs.php: ms_is_switched()

Determines if switch_to_blog() is in effect
wp-includes/option.php: delete_option()

Removes option by name. Prevents removal of protected ClassicPress options.
wp-includes/rewrite.php: flush_rewrite_rules()

Remove rewrite rules and then recreate rewrite rules.
wp-includes/load.php: wp_installing()

Check or set whether ClassicPress is in “installation” mode.
wp-includes/load.php: is_multisite()

If Multisite is enabled.

Changelog

Changelog
Version Description
WP-2.1.0 Introduced.