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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.

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

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Line Code
495       * @param string|array $query_args Passed to {@link parse_request()}
496       */
497      function main($query_args = '') {
498           $this->init();
499           $this->parse_request($query_args);
500           $this->send_headers();
501           $this->query_posts();
502           $this->handle_404();
503           $this->register_globals();
504           do_action_ref_array('wp', array(&$this));
505      }
506
507 }
508
509 /**
510  * Helper class to remove the need to use eval to replace $matches[] in query strings.
511  *
512  * @since 2.9.0
513  */