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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 |
|---|---|
| 515 | * Fires when the WP_Customize_Setting::save() method is called. |
| 516 | * |
| 517 | * The dynamic portion of the hook name, `$id_base` refers to |
| 518 | * the base slug of the setting name. |
| 519 | * |
| 520 | * @since 3.4.0 |
| 521 | * |
| 522 | * @param WP_Customize_Setting $this WP_Customize_Setting instance. |
| 523 | */ |
| 524 | do_action( "customize_save_{$id_base}", $this ); |
| 525 | |
| 526 | $this->update( $value ); |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * Fetch and sanitize the $_POST value for the setting. |
| 531 | * |
| 532 | * During a save request prior to save, post_value() provides the new value while value() does not. |
| 533 | * |