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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 |
|---|---|
| 2551 | |
| 2552 | if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) { |
| 2553 | /** |
| 2554 | * Filter callback for killing WordPress execution for AJAX requests. |
| 2555 | * |
| 2556 | * @since 3.4.0 |
| 2557 | * |
| 2558 | * @param callable $function Callback function name. |
| 2559 | */ |
| 2560 | $function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' ); |
| 2561 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 2562 | /** |
| 2563 | * Filter callback for killing WordPress execution for XML-RPC requests. |
| 2564 | * |
| 2565 | * @since 3.4.0 |
| 2566 | * |
| 2567 | * @param callable $function Callback function name. |
| 2568 | */ |
| 2569 | $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |