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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 |
|---|---|
| 4448 | /** |
| 4449 | * Filters a string cleaned and escaped for output as a URL. |
| 4450 | * |
| 4451 | * @since 2.3.0 |
| 4452 | * |
| 4453 | * @param string $good_protocol_url The cleaned URL to be returned. |
| 4454 | * @param string $original_url The URL prior to cleaning. |
| 4455 | * @param string $_context If 'display', replace ampersands and single quotes only. |
| 4456 | */ |
| 4457 | return apply_filters( 'clean_url', $good_protocol_url, $original_url, $_context ); |
| 4458 | } |
| 4459 | |
| 4460 | /** |
| 4461 | * Performs esc_url() for database or redirect usage. |
| 4462 | * |
| 4463 | * @since 2.8.0 |
| 4464 | * |
| 4465 | * @see esc_url() |
| 4466 | * |