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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 |
|---|---|
| 4547 | /** |
| 4548 | * Filters a string cleaned and escaped for output as a URL. |
| 4549 | * |
| 4550 | * @since 2.3.0 |
| 4551 | * |
| 4552 | * @param string $good_protocol_url The cleaned URL to be returned. |
| 4553 | * @param string $original_url The URL prior to cleaning. |
| 4554 | * @param string $_context If 'display', replace ampersands and single quotes only. |
| 4555 | */ |
| 4556 | return apply_filters( 'clean_url', $good_protocol_url, $original_url, $_context ); |
| 4557 | } |
| 4558 | |
| 4559 | /** |
| 4560 | * Sanitizes a URL for database or redirect usage. |
| 4561 | * |
| 4562 | * This function is an alias for sanitize_url(). |
| 4563 | * |
| 4564 | * @since 2.8.0 |
| 4565 | * @since 6.1.0 Turned into an alias for sanitize_url(). |