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INITIALISATION |
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============== |
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load wp-config.php |
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set up default constants |
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load advanced-cache.php if it exists |
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connect to mysql, select db |
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load object cache (object-cache.php if it exists, or wp-include/cache.php if not) |
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load l10n library |
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load mu plugins |
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DO_ACTION 'muplugins_loaded' (only accessible to mu plugins) |
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load active plugins |
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load pluggables.php |
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DO_ACTION 'plugins_loaded' (first hook available to plugins) |
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load rewrite rules |
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instantiate $wp_query, $wp_rewrite and $wp. |
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$wp_query is a global instance of the WP_Query class. For more info, see ANY QUERY |
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$wp_rewrite is a global instance of the WP_Rewrite class and contains our rewrite rules and functions |
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$wp is a global instance of the WP class and contains the functions that will parse our request and perform the main query (see REQUEST) |
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DO_ACTION 'setup_theme' |
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include child theme functions.php |
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include parent theme functions.php |
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DO_ACTION 'after_setup_theme' (first hook available to themes) |
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set up current user object |
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DO_ACTION 'init' |
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register widgets (DO_ACTION 'widget_init') |
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call wp() (which calls $wp->main()) |
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REQUEST |
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======= |
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$wp->parse_request() |
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loop over rewrite rules to find a match |
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APPLY_FILTERS 'query_vars' to the publicly available query vars |
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fill query vars with $_POSTs, $_GETs, and rewritten vars |
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APPLY_FILTERS 'request' to the request variables |
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DO_ACTION_REF_ARRAY 'parse_request' with array of request vars (query vars, request, matched rewrite rules, etc) |
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THE MAIN QUERY |
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============== |
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$wp->query_posts() |
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goto ANY QUERY |
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if posts are empty, set is_404() (and send 404 headers) |
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set all the query_vars to global variables |
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DO_ACTION_REF_ARRAY 'wp' with the main WP object |
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ANY QUERY |
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========= |
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WP_Query->query( query vars ) |
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WP_Query->parse_query( query vars ) |
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build query parameters based off query vars |
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set WP_Query->is_* vars based off query parameters |
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if this query is $wp_the_query then these determine the values of the global is_*() functions too |
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DO_ACTION_REF_ARRAY 'parse_query' with WP_Query object (query parameters, query vars, conditionals) |
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WP_Query->get_posts() |
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DO_ACTION_REF_ARRAY 'pre_get_posts' with WP_Query object |
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APPLY_FILTERS_REF_ARRAY 'posts_search' with search SQL |
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series of APPLY_FILTERS on the query SQL (if suppress_filters=false): |
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* posts_where |
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* posts_join |
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* posts_where_paged |
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* posts_groupby |
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* posts_join_paged |
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* posts_orderby |
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* posts_distinct |
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* post_limits |
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* posts_fields |
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* posts_clauses |
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APPLY_FILTERS_REF_ARRAY 'posts_request' (if suppress_filters=false) |
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fetch posts from the database |
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APPLY_FILTERS_REF_ARRAY 'posts_results' (if suppress_filters=false) |
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prepend sticky posts |
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APPLY_FILTERS_REF_ARRAY 'the_posts' (if suppress_filters=false) |
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return posts |
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TEMPLATE |
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======== |
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DO_ACTION 'template_redirect' |
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if is_feed() |
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load the feed template |
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else |
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look for template file in theme based on template hierarchy |
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APPLY_FILTERS 'template_include' |
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load the template file (which usually runs a loop @TODO document a loop) |
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DO_ACTION 'shutdown' |
johnbillion revised this gist