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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 |
|---|---|
| 2243 | function wp_die( $message = '', $title = '', $args = array() ) { |
| 2244 | if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) { |
| 2245 | /** |
| 2246 | * Filter callback for killing WordPress execution for AJAX requests. |
| 2247 | * |
| 2248 | * @since 3.4.0 |
| 2249 | * |
| 2250 | * @param callback $function Callback function name. |
| 2251 | */ |
| 2252 | $function = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' ); |
| 2253 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 2254 | /** |
| 2255 | * Filter callback for killing WordPress execution for XML-RPC requests. |
| 2256 | * |
| 2257 | * @since 3.4.0 |
| 2258 | * |
| 2259 | * @param callback $function Callback function name. |
| 2260 | */ |
| 2261 | $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |