Source View: wp_headers

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
349
350                if ( ($client_last_modified && $client_etag) ?
351                           (($client_modified_timestamp >= $wp_modified_timestamp) && ($client_etag == $wp_etag)) :
352                           (($client_modified_timestamp >= $wp_modified_timestamp) || ($client_etag == $wp_etag)) ) {
353                     $status = 304;
354                     $exit_required = true;
355                }
356           }
357
358           $headers = apply_filters('wp_headers', $headers, $this);
359
360           if ( ! empty( $status ) )
361                status_header( $status );
362           foreach( (array) $headers as $name => $field_value )
363                @header("{$name}: {$field_value}");
364
365           if ($exit_required)
366                exit();
367