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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 |
---|---|
516 | if ( isset( $alloptions[$option_name] ) ) { |
517 | $alloptions[$option_name] = $newvalue; |
518 | wp_cache_set( 'alloptions', $alloptions, 'options' ); |
519 | } else { |
520 | wp_cache_set( $option_name, $newvalue, 'options' ); |
521 | } |
522 |
|
523 | $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->options SET option_value = %s WHERE option_name = %s", $newvalue, $option_name ) ); |
524 | if ( $wpdb->rows_affected == 1 ) { |
525 | do_action( "update_option_{$option_name}", $oldvalue, $_newvalue ); |
526 | return true; |
527 | } |
528 | return false; |
529 | } |
530 |
|
531 | /** |
532 | * Add a new option. |
533 | * |
534 | * You can create options without values and then add values later. Does not |