Jump to content

Recommended Posts

Hi guys,

 

I want to code the breadcrumb for my website i.e.

 

Home > Book > Chapter > Page

 

My navigation is structured in a table aptly named 'navigation'.

 

CREATE TABLE IF NOT EXISTS `navigation` (
  `navID` smallint(5) unsigned NOT NULL auto_increment,
  `nav` text character set utf8 NOT NULL,
  `url` text character set utf8 NOT NULL,
  `parentID` smallint(5) unsigned default NULL,
  PRIMARY KEY  (`navID`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=4 ;

 

A contentID (linked to navID) is specified for the current page.  Will I have to 'backwards search' the navigation table for the relevant chapter/book?

 

All suggestions welcome...

Link to comment
https://forums.phpfreaks.com/topic/130053-coding-the-breadcrumb/
Share on other sites

The "genious" way you could use is called the "modified preorder tree traversal" algorithm (or "nested set" if you'd like a shorter name). Using this algorithm you'll be able to fetch the entire tree in a single query.

 

http://dev.mysql.com/tech-resources/articles/hierarchical-data.html

This thread is more than a year old. Please don't revive it unless you have something important to add.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.