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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 |
|---|---|
| 527 | $alloptions[$option_name] = $newvalue; |
| 528 | wp_cache_set( 'alloptions', $alloptions, 'options' ); |
| 529 | } else { |
| 530 | wp_cache_set( $option_name, $newvalue, 'options' ); |
| 531 | } |
| 532 | |
| 533 | $wpdb->update($wpdb->options, array('option_value' => $newvalue), array('option_name' => $option_name) ); |
| 534 | |
| 535 | if ( $wpdb->rows_affected == 1 ) { |
| 536 | do_action( "update_option_{$option_name}", $oldvalue, $_newvalue ); |
| 537 | return true; |
| 538 | } |
| 539 | return false; |
| 540 | } |
| 541 | |
| 542 | /** |
| 543 | * Add a new option. |
| 544 | * |
| 545 | * You do not need to serialize values, if the value needs to be serialize, then |