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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 |
|---|---|
| 628 | * Filters the current feed URL. |
| 629 | * |
| 630 | * @since 3.6.0 |
| 631 | * |
| 632 | * @see set_url_scheme() |
| 633 | * @see wp_unslash() |
| 634 | * |
| 635 | * @param string $feed_link The link for the feed with set URL scheme. |
| 636 | */ |
| 637 | echo esc_url( apply_filters( 'self_link', set_url_scheme( 'http://' . $host['host'] . wp_unslash( $_SERVER['REQUEST_URI'] ) ) ) ); |
| 638 | } |
| 639 | |
| 640 | /* |
| 641 | * Get the timestamp of the most recently modified post from WP_Query. |
| 642 | * |
| 643 | * If viewing a comment feed, the timestamp of the most recently modified |
| 644 | * comment will be returned. |
| 645 | * |
| 646 | * @global WP_Query $wp_query The global WP_Query object. |