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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 3605 | * |
| 3606 | * @param string $option Name of option to remove. Expected to not be SQL-escaped. |
| 3607 | * @return bool True, if succeed. False, if failure. |
| 3608 | */ |
| 3609 | function delete_site_option( $option ) { |
| 3610 | global $wpdb; |
| 3611 | |
| 3612 | // ms_protect_special_option( $option ); @todo |
| 3613 | |
| 3614 | do_action( 'pre_delete_site_option_' . $option ); |
| 3615 | |
| 3616 | if ( !is_multisite() ) { |
| 3617 | $result = delete_option( $option ); |
| 3618 | } else { |
| 3619 | $row = $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM {$wpdb->sitemeta} WHERE meta_key = %s AND site_id = %d", $option, $wpdb->siteid ) ); |
| 3620 | if ( is_null( $row ) || !$row->meta_id ) |
| 3621 | return false; |
| 3622 | $cache_key = "{$wpdb->siteid}:$option"; |
| 3623 | wp_cache_delete( $cache_key, 'site-options' ); |