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 |
---|---|
936 | * |
937 | * Passing a truthy value to the filter will effectively short-circuit retrieval, |
938 | * returning the passed value instead. |
939 | * |
940 | * @since 2.9.0 As 'pre_site_option_' . $key |
941 | * @since 3.0.0 |
942 | * |
943 | * @param mixed $pre_option The default value to return if the option does not exist. |
944 | */ |
945 | $pre = apply_filters( 'pre_site_option_' . $option, false ); |
946 |
|
947 | if ( false !== $pre ) |
948 | return $pre; |
949 |
|
950 | // prevent non-existent options from triggering multiple queries |
951 | $notoptions_key = "{$wpdb->siteid}:notoptions"; |
952 | $notoptions = wp_cache_get( $notoptions_key, 'site-options' ); |
953 |
|
954 | if ( isset( $notoptions[$option] ) ) { |