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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 1868 | 'authors' => '' |
| 1869 | ); |
| 1870 | |
| 1871 | $r = wp_parse_args( $args, $defaults ); |
| 1872 | extract( $r, EXTR_SKIP ); |
| 1873 | |
| 1874 | $key = md5( serialize( $r ) ); |
| 1875 | if ( $cache = wp_cache_get( 'get_pages', 'posts' ) ) |
| 1876 | if ( isset( $cache[ $key ] ) ) |
| 1877 | return apply_filters('get_pages', $cache[ $key ], $r ); |
| 1878 | |
| 1879 | $inclusions = ''; |
| 1880 | if ( !empty($include) ) { |
| 1881 | $child_of = 0; //ignore child_of, exclude, meta_key, and meta_value params if using include |
| 1882 | $exclude = ''; |
| 1883 | $meta_key = ''; |
| 1884 | $meta_value = ''; |
| 1885 | $hierarchical = false; |
| 1886 | $incpages = preg_split('/[\s,]+/',$include); |
| Line | Code |
| 1942 | $query .= " WHERE (post_type = 'page' AND post_status = 'publish') $exclusions $inclusions " ; |
| 1943 | // expected_slashed ($meta_key, $meta_value) -- also, it looks funky |
| 1944 | $query .= ( empty( $meta_key ) | empty($meta_value) ? "" : " AND ($wpdb->posts.ID = $wpdb->postmeta.post_id AND $wpdb->postmeta.meta_key = '$meta_key' AND $wpdb->postmeta.meta_value = '$meta_value' )" ) ; |
| 1945 | $query .= $author_query; |
| 1946 | $query .= " ORDER BY " . $sort_column . " " . $sort_order ; |
| 1947 | |
| 1948 | $pages = $wpdb->get_results($query); |
| 1949 | |
| 1950 | if ( empty($pages) ) |
| 1951 | return apply_filters('get_pages', array(), $r); |
| 1952 | |
| 1953 | // Update cache. |
| 1954 | update_page_cache($pages); |
| 1955 | |
| 1956 | if ( $child_of || $hierarchical ) |
| 1957 | $pages = & get_page_children($child_of, $pages); |
| 1958 | |
| 1959 | $cache[ $key ] = $pages; |
| 1960 | wp_cache_set( 'get_pages', $cache, 'posts' ); |
| 1961 | |
| 1962 | $pages = apply_filters('get_pages', $pages, $r); |
| 1963 | |
| 1964 | return $pages; |
| 1965 | } |
| 1966 | |
| 1967 | // |
| 1968 | // Attachment functions |
| 1969 | // |
| 1970 | |
| 1971 | /** |