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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 |
---|---|
356 | * The dynamic portion of the hook name, `$option`, refers to the option name. |
357 | * |
358 | * @since 2.0.1 |
359 | * @since 4.4.0 The `$option` parameter was added. |
360 | * |
361 | * @param mixed $old_value The old option value. |
362 | * @param mixed $value The new option value. |
363 | * @param string $option Option name. |
364 | */ |
365 | do_action( "update_option_{$option}", $old_value, $value, $option ); |
366 |
|
367 | /** |
368 | * Fires after the value of an option has been successfully updated. |
369 | * |
370 | * @since 2.9.0 |
371 | * |
372 | * @param string $option Name of the updated option. |
373 | * @param mixed $old_value The old option value. |
374 | * @param mixed $value The new option value. |