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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 |
|---|---|
| 807 | * @uses do_action() Calls 'add_site_option_$option' and 'add_site_option' hooks on success. |
| 808 | * |
| 809 | * @param string $option Name of option to add. Expected to not be SQL-escaped. |
| 810 | * @param mixed $value Optional. Option value, can be anything. Expected to not be SQL-escaped. |
| 811 | * @return bool False if option was not added and true if option was added. |
| 812 | */ |
| 813 | function add_site_option( $option, $value ) { |
| 814 | global $wpdb; |
| 815 | |
| 816 | $value = apply_filters( 'pre_add_site_option_' . $option, $value ); |
| 817 | |
| 818 | if ( !is_multisite() ) { |
| 819 | $result = add_option( $option, $value ); |
| 820 | } else { |
| 821 | $cache_key = "{$wpdb->siteid}:$option"; |
| 822 | |
| 823 | if ( false !== get_site_option( $option ) ) |
| 824 | return false; |
| 825 | |