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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 |
|---|---|
| 3445 | } |
| 3446 | |
| 3447 | /** |
| 3448 | * Filters the list of URLs allowed to be clicked and followed in the Customizer preview. |
| 3449 | * |
| 3450 | * @since 3.4.0 |
| 3451 | * |
| 3452 | * @param array $allowed_urls An array of allowed URLs. |
| 3453 | */ |
| 3454 | $allowed_urls = array_unique( apply_filters( 'customize_allowed_urls', $allowed_urls ) ); |
| 3455 | |
| 3456 | return $allowed_urls; |
| 3457 | } |
| 3458 | |
| 3459 | /** |
| 3460 | * Get messenger channel. |
| 3461 | * |
| 3462 | * @since 4.7.0 |
| 3463 | * @access public |