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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 |
---|---|
412 | * The dynamic portion of the hook name, `$option`, refers to the option name. |
413 | * |
414 | * @since 2.0.1 |
415 | * @since 4.4.0 The `$option` parameter was added. |
416 | * |
417 | * @param mixed $old_value The old option value. |
418 | * @param mixed $value The new option value. |
419 | * @param string $option Option name. |
420 | */ |
421 | do_action( "update_option_{$option}", $old_value, $value, $option ); |
422 |
|
423 | /** |
424 | * Fires after the value of an option has been successfully updated. |
425 | * |
426 | * @since 2.9.0 |
427 | * |
428 | * @param string $option Name of the updated option. |
429 | * @param mixed $old_value The old option value. |
430 | * @param mixed $value The new option value. |