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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 |
|---|---|
| 2458 | |
| 2459 | if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) { |
| 2460 | /** |
| 2461 | * Filter callback for killing WordPress execution for AJAX requests. |
| 2462 | * |
| 2463 | * @since 3.4.0 |
| 2464 | * |
| 2465 | * @param callable $function Callback function name. |
| 2466 | */ |
| 2467 | $function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' ); |
| 2468 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 2469 | /** |
| 2470 | * Filter callback for killing WordPress execution for XML-RPC requests. |
| 2471 | * |
| 2472 | * @since 3.4.0 |
| 2473 | * |
| 2474 | * @param callable $function Callback function name. |
| 2475 | */ |
| 2476 | $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |