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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 |
|---|---|
| 556 | * |
| 557 | * The dynamic portion of the hook name, `$this->ID`, refers to the setting ID. |
| 558 | * |
| 559 | * @since 4.6.0 |
| 560 | * |
| 561 | * @param WP_Error $validity Filtered from `true` to `WP_Error` when invalid. |
| 562 | * @param mixed $value Value of the setting. |
| 563 | * @param WP_Customize_Setting $this WP_Customize_Setting instance. |
| 564 | */ |
| 565 | $validity = apply_filters( "customize_validate_{$this->id}", $validity, $value, $this ); |
| 566 | |
| 567 | if ( is_wp_error( $validity ) && empty( $validity->errors ) ) { |
| 568 | $validity = true; |
| 569 | } |
| 570 | return $validity; |
| 571 | } |
| 572 | |
| 573 | /** |
| 574 | * Get the root value for a setting, especially for multidimensional ones. |