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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 |
|---|---|
| 674 | * Filters the current feed URL. |
| 675 | * |
| 676 | * @since 3.6.0 |
| 677 | * |
| 678 | * @see set_url_scheme() |
| 679 | * @see wp_unslash() |
| 680 | * |
| 681 | * @param string $feed_link The link for the feed with set URL scheme. |
| 682 | */ |
| 683 | echo esc_url( apply_filters( 'self_link', get_self_link() ) ); |
| 684 | } |
| 685 | |
| 686 | /** |
| 687 | * Get the UTC time of the most recently modified post from WP_Query. |
| 688 | * |
| 689 | * If viewing a comment feed, the time of the most recently modified |
| 690 | * comment will be returned. |
| 691 | * |
| 692 | * @global WP_Query $wp_query WordPress Query object. |