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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 |
---|---|
2822 | } while ( $post_name_check ); |
2823 | $slug = $alt_post_name; |
2824 | } |
2825 | } elseif ( in_array( $post_type, $hierarchical_post_types ) ) { |
2826 | // Page slugs must be unique within their own trees. Pages are in a separate |
2827 | // namespace than posts so page slugs are allowed to overlap post slugs. |
2828 | $check_sql = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND post_type IN ( '" . implode( "', '", esc_sql( $hierarchical_post_types ) ) . "' ) AND ID != %d AND post_parent = %d LIMIT 1"; |
2829 | $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID, $post_parent ) ); |
2830 |
|
2831 | if ( $post_name_check || in_array( $slug, $feeds ) || preg_match( "@^($wp_rewrite->pagination_base)?\d+$@", $slug ) || apply_filters( 'wp_unique_post_slug_is_bad_hierarchical_slug', false, $slug, $post_type, $post_parent ) ) { |
2832 | $suffix = 2; |
2833 | do { |
2834 | $alt_post_name = substr( $slug, 0, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix"; |
2835 | $post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $alt_post_name, $post_ID, $post_parent ) ); |
2836 | $suffix++; |
2837 | } while ( $post_name_check ); |
2838 | $slug = $alt_post_name; |
2839 | } |
2840 | } else { |