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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 |
|---|---|
| 247 | * Filter a specific option before its value is (maybe) serialized and updated. |
| 248 | * |
| 249 | * The dynamic portion of the hook name, $option, refers to the option name. |
| 250 | * |
| 251 | * @since 2.6.0 |
| 252 | * |
| 253 | * @param mixed $value The new, unserialized option value. |
| 254 | * @param mixed $old_value The old option value. |
| 255 | */ |
| 256 | $value = apply_filters( 'pre_update_option_' . $option, $value, $old_value ); |
| 257 | |
| 258 | /** |
| 259 | * Filter an option before its value is (maybe) serialized and updated. |
| 260 | * |
| 261 | * @since 3.9.0 |
| 262 | * |
| 263 | * @param mixed $value The new, unserialized option value. |
| 264 | * @param string $option Name of the option. |
| 265 | * @param mixed $old_value The old option value. |