WP hooks navigation: Home/browse • Actions index • Filters index
To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
|---|---|
| 486 | global $wpdb; |
| 487 | |
| 488 | wp_protect_special_option( $option_name ); |
| 489 | |
| 490 | $safe_option_name = $wpdb->escape( $option_name ); |
| 491 | $newvalue = sanitize_option( $option_name, $newvalue ); |
| 492 | |
| 493 | $oldvalue = get_option( $safe_option_name ); |
| 494 | |
| 495 | $newvalue = apply_filters( 'pre_update_option_' . $option_name, $newvalue, $oldvalue ); |
| 496 | |
| 497 | // If the new and old values are the same, no need to update. |
| 498 | if ( $newvalue === $oldvalue ) |
| 499 | return false; |
| 500 | |
| 501 | if ( false === $oldvalue ) { |
| 502 | add_option( $option_name, $newvalue ); |
| 503 | return true; |
| 504 | } |