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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 |
|---|---|
| 3888 | wp_cache_set( $cache_key, $value, 'site-options' ); |
| 3889 | |
| 3890 | $_value = $value; |
| 3891 | $value = maybe_serialize( $value ); |
| 3892 | $result = $wpdb->insert( $wpdb->sitemeta, array('site_id' => $wpdb->siteid, 'meta_key' => $option, 'meta_value' => $value ) ); |
| 3893 | $value = $_value; |
| 3894 | } |
| 3895 | |
| 3896 | if ( $result ) { |
| 3897 | do_action( "add_site_option_{$option}", $option, $value ); |
| 3898 | do_action( "add_site_option", $option, $value ); |
| 3899 | return true; |
| 3900 | } |
| 3901 | return false; |
| 3902 | } |
| 3903 | |
| 3904 | /** |
| 3905 | * Removes site option by name. |
| 3906 | * |