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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 |
|---|---|
| 252 | if ( isset( $alloptions[$option] ) ) { |
| 253 | $alloptions[ $option ] = $serialized_value; |
| 254 | wp_cache_set( 'alloptions', $alloptions, 'options' ); |
| 255 | } else { |
| 256 | wp_cache_set( $option, $serialized_value, 'options' ); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | do_action( "update_option_{$option}", $old_value, $value ); |
| 261 | do_action( 'updated_option', $option, $old_value, $value ); |
| 262 | return true; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Add a new option. |
| 267 | * |
| 268 | * You do not need to serialize values. If the value needs to be serialized, then |
| 269 | * it will be serialized before it is inserted into the database. Remember, |
| 270 | * resources can not be serialized or added as an option. |