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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 |
|---|---|
| 3033 | $function = apply_filters( 'wp_die_xml_handler', '_xml_wp_die_handler' ); |
| 3034 | } else { |
| 3035 | /** |
| 3036 | * Filters the callback for killing WordPress execution for all non-Ajax, non-JSON, non-XML requests. |
| 3037 | * |
| 3038 | * @since 3.0.0 |
| 3039 | * |
| 3040 | * @param callable $function Callback function name. |
| 3041 | */ |
| 3042 | $function = apply_filters( 'wp_die_handler', '_default_wp_die_handler' ); |
| 3043 | } |
| 3044 | |
| 3045 | call_user_func( $function, $message, $title, $args ); |
| 3046 | } |
| 3047 | |
| 3048 | /** |
| 3049 | * Kills WordPress execution and displays HTML page with an error message. |
| 3050 | * |
| 3051 | * This is the default handler for wp_die(). If you want a custom one, |