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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 |
|---|---|
| 240 | if ( ! $result ) |
| 241 | return false; |
| 242 | |
| 243 | $notoptions = wp_cache_get( 'notoptions', 'options' ); |
| 244 | if ( is_array( $notoptions ) && isset( $notoptions[$option] ) ) { |
| 245 | unset( $notoptions[$option] ); |
| 246 | wp_cache_set( 'notoptions', $notoptions, 'options' ); |
| 247 | } |
| 248 | |
| 249 | do_action( 'update_option', $option, $old_value, $value ); |
| 250 | if ( ! defined( 'WP_INSTALLING' ) ) { |
| 251 | $alloptions = wp_load_alloptions(); |
| 252 | if ( isset( $alloptions[$option] ) ) { |
| 253 | $alloptions[ $option ] = $serialized_value; |
| 254 | wp_cache_set( 'alloptions', $alloptions, 'options' ); |
| 255 | } else { |
| 256 | wp_cache_set( $option, $serialized_value, 'options' ); |
| 257 | } |
| 258 | } |