🤑 Join the Treehouse affiliate program and earn 25% recurring commission!

New No-Code Track! 🚀start learning today!

🌟 Dreaming of a bright future? 🎓 Ask about the Treehouse Scholarship program! 🚀

✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

  • Treehouse Logo
  • Plans
    Chevron
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
  • Library
    Chevron
    • All Courses
    • Tracks
    • College Credit
  • Techdegree
    Chevron
    • Overview
    • Front End Development
    • Full Stack JavaScript
    • Data Analysis
    • UX Design
    • Python
  • Community
    Chevron
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
  • Resources
    Chevron
    • Career Toolbox
    • CodeForward
    • Free Treehouse Near Me
    • Jobs
    • Blog
    • Support
    • About
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks College Credit
  • Overview Front End Web Development Full Stack JavaScript Python Development Data Analysis UX Design
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Career Toolbox CodeForward Free Treehouse Near Me Jobs Blog Support About
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • Android
      • • APIs
      • • Coding for Kids
      • • College Credit
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Game Development
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • No-Code
      • • PHP
      • • Professional Growth
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
      • • Swift
  • Pierre Grönberg
    Pierre Grönberg
    10,294 Points

    My Catalog pages won't load. catalog.php catalog.php?cat=books catalog.php?cat=movies catalog.php?cat=music

    Posted April 2, 2019 9:12am by Pierre Grönberg
    Pierre Grönberg
    10,294 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    1 Answer

  • Cliff Jackson
    Cliff Jackson
    2,887 Points

    Breadcrumbs not showing on preview??

    Posted October 13, 2018 11:12am by Cliff Jackson
    Cliff Jackson
    2,887 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    1 Answer

  • Siraj Khan
    Siraj Khan
    3,451 Points

    In the breadcrumbs class why do we repeat echo $item["category'] twice.?

    Posted August 18, 2018 10:11am by Siraj Khan
    Siraj Khan
    3,451 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    1 Answer

  • Alvin Hue
    Alvin Hue
    4,496 Points

    catalog.php view details

    Posted February 28, 2017 9:26am by Alvin Hue
    Alvin Hue
    4,496 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    2 Answers

  • Tim Martin
    Tim Martin
    10,292 Points

    Undefined Variable

    Posted July 19, 2016 11:15am by Tim Martin
    Tim Martin
    10,292 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    1 Answer

  • Dhruva Goyal
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    Dhruva Goyal
    Full Stack JavaScript Techdegree Student 4,138 Points

    None of the links to details.php are working

    Posted July 7, 2016 2:09pm by Dhruva Goyal
    .a{fill-rule:evenodd;}techdegree
    Dhruva Goyal
    Full Stack JavaScript Techdegree Student 4,138 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    1 Answer

  • jorge luis uribe millan
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    jorge luis uribe millan
    Front End Web Development Techdegree Student 1,428 Points

    I don't have the same menu for the catalog

    Posted June 17, 2016 3:38pm by jorge luis uribe millan
    .a{fill-rule:evenodd;}techdegree
    jorge luis uribe millan
    Front End Web Development Techdegree Student 1,428 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    2 Answers

  • Martina Carrington
    PLUS
    Martina Carrington
    Courses Plus Student 15,807 Points

    i think it an error on my breadcrumbs.php coding

    Posted May 6, 2016 12:34am by Martina Carrington
    Martina Carrington
    Courses Plus Student 15,807 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    2 Answers

  • Nick Winner
    Nick Winner
    615 Points

    Why don't we just put > instead of writing > ?

    Posted April 23, 2016 12:40am by Nick Winner
    Nick Winner
    615 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    5 Answers

  • Jason Anders
    MOD
    Jason Anders
    Treehouse Moderator 145,860 Points

    FYI: If you are using the downloaded files and your own editor

    Posted February 6, 2016 6:53pm by Jason Anders
    Jason Anders
    Treehouse Moderator 145,860 Points
    • PHP
    • Build a Basic PHP Website (2018)
    • Listing and Sorting Inventory Items
    • Breadcrumbs

    2 Answers

Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post.

    Treehouse

  • About
  • Blog
  • Careers
  • Community
  • Stories
  • Shop
  • Contact
  • Gift Card

See Full Catalogue

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
  • Python Development
  • Data Analysis
  • UX Design

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
  • ...see more

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
  • ...see more

Explore

  • Plans
  • Affiliates
  • Perks
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
Terms & Conditions | Privacy

© 2025 Treehouse Island, Inc.