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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 |
|---|---|
| 3706 | $callback = apply_filters( 'wp_die_jsonp_handler', '_jsonp_wp_die_handler' ); |
| 3707 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 3708 | /** |
| 3709 | * Filters the callback for killing WordPress execution for XML-RPC requests. |
| 3710 | * |
| 3711 | * @since 3.4.0 |
| 3712 | * |
| 3713 | * @param callable $callback Callback function name. |
| 3714 | */ |
| 3715 | $callback = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |
| 3716 | } elseif ( wp_is_xml_request() |
| 3717 | || isset( $wp_query ) && |
| 3718 | ( function_exists( 'is_feed' ) && is_feed() |
| 3719 | || function_exists( 'is_comment_feed' ) && is_comment_feed() |
| 3720 | || function_exists( 'is_trackback' ) && is_trackback() ) ) { |
| 3721 | /** |
| 3722 | * Filters the callback for killing WordPress execution for XML requests. |
| 3723 | * |
| 3724 | * @since 5.2.0 |