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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 |
|---|---|
| 2652 | |
| 2653 | if ( wp_doing_ajax() ) { |
| 2654 | /** |
| 2655 | * Filters the callback for killing WordPress execution for Ajax requests. |
| 2656 | * |
| 2657 | * @since 3.4.0 |
| 2658 | * |
| 2659 | * @param callable $function Callback function name. |
| 2660 | */ |
| 2661 | $function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' ); |
| 2662 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 2663 | /** |
| 2664 | * Filters the callback for killing WordPress execution for XML-RPC requests. |
| 2665 | * |
| 2666 | * @since 3.4.0 |
| 2667 | * |
| 2668 | * @param callable $function Callback function name. |
| 2669 | */ |
| 2670 | $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |