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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 |
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379 |
|
380 | /** |
381 | * Fires before an option is added. |
382 | * |
383 | * @since 2.9.0 |
384 | * |
385 | * @param string $option Name of the option to add. |
386 | * @param mixed $value Value of the option. |
387 | */ |
388 | do_action( 'add_option', $option, $value ); |
389 |
|
390 | $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 ) ); |
391 | if ( ! $result ) |
392 | return false; |
393 |
|
394 | if ( ! defined( 'WP_INSTALLING' ) ) { |
395 | if ( 'yes' == $autoload ) { |
396 | $alloptions = wp_load_alloptions(); |
397 | $alloptions[ $option ] = $serialized_value; |