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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 |
|---|---|
| 3165 | $function = apply_filters( 'wp_die_json_handler', '_json_wp_die_handler' ); |
| 3166 | } elseif ( wp_is_jsonp_request() ) { |
| 3167 | /** |
| 3168 | * Filters the callback for killing WordPress execution for JSONP requests. |
| 3169 | * |
| 3170 | * @since 5.2.0 |
| 3171 | * |
| 3172 | * @param callable $function Callback function name. |
| 3173 | */ |
| 3174 | $function = apply_filters( 'wp_die_jsonp_handler', '_jsonp_wp_die_handler' ); |
| 3175 | } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 3176 | /** |
| 3177 | * Filters the callback for killing WordPress execution for XML-RPC requests. |
| 3178 | * |
| 3179 | * @since 3.4.0 |
| 3180 | * |
| 3181 | * @param callable $function Callback function name. |
| 3182 | */ |
| 3183 | $function = apply_filters( 'wp_die_xmlrpc_handler', '_xmlrpc_wp_die_handler' ); |