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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 |
|---|---|
| 3428 | $function = apply_filters( 'wp_die_json_handler', '_json_wp_die_handler' ); |
| 3429 | } elseif ( wp_is_jsonp_request() ) { |
| 3430 | /** |
| 3431 | * Filters the callback for killing WordPress execution for JSONP requests. |
| 3432 | * |
| 3433 | * @since 5.2.0 |
| 3434 | * |
| 3435 | * @param callable $function Callback function name. |
| 3436 | */ |
| 3437 | $function = apply_filters( 'wp_die_jsonp_handler', '_jsonp_wp_die_handler' ); |
| 3438 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 3439 | /** |
| 3440 | * Filters the callback for killing WordPress execution for XML-RPC requests. |
| 3441 | * |
| 3442 | * @since 3.4.0 |
| 3443 | * |
| 3444 | * @param callable $function Callback function name. |
| 3445 | */ |
| 3446 | $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |