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 |
|---|---|
| 496 | global $wpdb; |
| 497 | |
| 498 | wp_protect_special_option( $option_name ); |
| 499 | |
| 500 | $safe_option_name = esc_sql( $option_name ); |
| 501 | $newvalue = sanitize_option( $option_name, $newvalue ); |
| 502 | |
| 503 | $oldvalue = get_option( $safe_option_name ); |
| 504 | |
| 505 | $newvalue = apply_filters( 'pre_update_option_' . $option_name, $newvalue, $oldvalue ); |
| 506 | |
| 507 | // If the new and old values are the same, no need to update. |
| 508 | if ( $newvalue === $oldvalue ) |
| 509 | return false; |
| 510 | |
| 511 | if ( false === $oldvalue ) { |
| 512 | add_option( $option_name, $newvalue ); |
| 513 | return true; |
| 514 | } |