February 11, 2011 
Definition:
function delete_site_option( $option ) {}
Removes site option by name.
Parameters
- string $option: Name of option to remove. Expected to not be SQL-escaped.
Return values
returns:True, if succeed. False, if failure.
Defined actions
- pre_delete_site_option_’.$option
do_action( 'pre_delete_site_option_' . $option );
Source code
function delete_site_option( $option ) {
global $wpdb;
// ms_protect_special_option( $option ); @todo
do_action( 'pre_delete_site_option_' . $option );
if ( !is_multisite() ) {
$result = delete_option( $option );
} else {
$row = $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM {$wpdb->sitemeta} WHERE meta_key = %s AND site_id = %d", $option, $wpdb->siteid ) );
if ( is_null( $row ) || !$row->meta_id )
return false;
$cache_key = "{$wpdb->siteid}:$option";
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A HitchHackers guide through WordPress 
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