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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_xml_handler', '_xml_wp_die_handler' ); |
| 3379 | } else { |
| 3380 | /** |
| 3381 | * Filters the callback for killing WordPress execution for all non-Ajax, non-JSON, non-XML requests. |
| 3382 | * |
| 3383 | * @since 3.0.0 |
| 3384 | * |
| 3385 | * @param callable $function Callback function name. |
| 3386 | */ |
| 3387 | $function = apply_filters( 'wp_die_handler', '_default_wp_die_handler' ); |
| 3388 | } |
| 3389 | |
| 3390 | call_user_func( $function, $message, $title, $args ); |
| 3391 | } |
| 3392 | |
| 3393 | /** |
| 3394 | * Kills WordPress execution and displays HTML page with an error message. |
| 3395 | * |
| 3396 | * This is the default handler for wp_die(). If you want a custom one, |