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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 |
|---|---|
| 2604 | |
| 2605 | if ( wp_doing_ajax() ) { |
| 2606 | /** |
| 2607 | * Filters the callback for killing WordPress execution for Ajax requests. |
| 2608 | * |
| 2609 | * @since 3.4.0 |
| 2610 | * |
| 2611 | * @param callable $function Callback function name. |
| 2612 | */ |
| 2613 | $function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' ); |
| 2614 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 2615 | /** |
| 2616 | * Filters the callback for killing WordPress execution for XML-RPC requests. |
| 2617 | * |
| 2618 | * @since 3.4.0 |
| 2619 | * |
| 2620 | * @param callable $function Callback function name. |
| 2621 | */ |
| 2622 | $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |