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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 |
|---|---|
| 617 | |
| 618 | /** |
| 619 | * Fires before an option is added. |
| 620 | * |
| 621 | * @since 2.9.0 |
| 622 | * |
| 623 | * @param string $option Name of the option to add. |
| 624 | * @param mixed $value Value of the option. |
| 625 | */ |
| 626 | do_action( 'add_option', $option, $value ); |
| 627 | |
| 628 | $result = $wpdb->query( $wpdb->prepare( "INSERT INTO `$wpdb->options` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, %s) ON DUPLICATE KEY UPDATE `option_name` = VALUES(`option_name`), `option_value` = VALUES(`option_value`), `autoload` = VALUES(`autoload`)", $option, $serialized_value, $autoload ) ); |
| 629 | if ( ! $result ) { |
| 630 | return false; |
| 631 | } |
| 632 | |
| 633 | if ( ! wp_installing() ) { |
| 634 | if ( 'yes' === $autoload ) { |
| 635 | $alloptions = wp_load_alloptions( true ); |