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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 |
|---|---|
| 3378 | $function = apply_filters( 'wp_die_json_handler', '_json_wp_die_handler' ); |
| 3379 | } elseif ( wp_is_jsonp_request() ) { |
| 3380 | /** |
| 3381 | * Filters the callback for killing WordPress execution for JSONP requests. |
| 3382 | * |
| 3383 | * @since 5.2.0 |
| 3384 | * |
| 3385 | * @param callable $function Callback function name. |
| 3386 | */ |
| 3387 | $function = apply_filters( 'wp_die_jsonp_handler', '_jsonp_wp_die_handler' ); |
| 3388 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 3389 | /** |
| 3390 | * Filters the callback for killing WordPress execution for XML-RPC requests. |
| 3391 | * |
| 3392 | * @since 3.4.0 |
| 3393 | * |
| 3394 | * @param callable $function Callback function name. |
| 3395 | */ |
| 3396 | $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |