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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 |
|---|---|
| 598 | $notoptions = wp_cache_get( 'notoptions', 'options' ); // yes, again... we need it to be fresh |
| 599 | if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) { |
| 600 | unset( $notoptions[$option] ); |
| 601 | wp_cache_set( 'notoptions', $notoptions, 'options' ); |
| 602 | } |
| 603 | |
| 604 | $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, $value, $autoload ) ); |
| 605 | |
| 606 | if ( $result ) { |
| 607 | do_action( "add_option_{$option}", $option, $_value ); |
| 608 | do_action( 'added_option', $option, $_value ); |
| 609 | return true; |
| 610 | } |
| 611 | return false; |
| 612 | } |
| 613 | |
| 614 | /** |
| 615 | * Removes option by name. Prevents removal of protected WordPress options. |
| 616 | * |