Skip to main content

NOTICE: On Friday Nov 6, Workspaces will be temporarily unavailable for maintenance.

🚀 In our NEW AI Bootcamp you'll build a working app in 28 days, no experience required. Free to all subscription levels.

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

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

  • Treehouse Logo
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
    • All Courses
    • Tracks
    • AI Bootcamp
    • College Credit
    • Techdegree Bootcamps
    • Front End Development
    • Full Stack JavaScript
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
    • Explore
    • Career Toolbox
    • Free Treehouse Near Me
    • Affiliates
    • Blog
    • Support
    • About
    • Learn
    • Beginner's Guide to Coding
    • Data Analysis with SQL & Python
    • Front-End Web Development
    • Python Programming Basics
    • Techdegree Bootcamp Overview
    • UX Design Fundamentals
    • AI Tools for Beginners
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks AI Bootcamp College Credit
  • Techdegree Bootcamps Front End Web Development Full Stack JavaScript
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Explore Career Toolbox Free Treehouse Near Me Affiliates Blog Support About
    Learn Beginner's Guide to Coding Data Analysis with SQL & Python Front-End Web Development Python Programming Basics Techdegree Bootcamp Overview UX Design Fundamentals AI Tools for Beginners
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
Loading banner... Start your free trial at Treehouse
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • 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
      • • Vibe Coding
  • Alexei Parphyonov
    Alexei Parphyonov
    34,128 Points

    Calling Non-Static Function from withing Render Class

    Posted April 2, 2019 6:37pm by Alexei Parphyonov
    Alexei Parphyonov
    34,128 Points
    • PHP
    • Object-Oriented PHP Basics
    • Building the Recipe
    • Separating Methods

    0 Answers

  • Yohan Park
    Yohan Park
    7,148 Points

    why initialize $output with "" ?

    Posted December 21, 2018 3:33am by Yohan Park
    Yohan Park
    7,148 Points
    • PHP
    • Object-Oriented PHP Basics
    • Building the Recipe
    • Separating Methods

    0 Answers

  • mahdi askari
    mahdi askari
    15,174 Points

    I don't understand why we should make two classes. Recipe and Render? Why can't we use one class?

    Posted March 6, 2018 9:10am by mahdi askari
    mahdi askari
    15,174 Points
    • PHP
    • Object-Oriented PHP Basics
    • Building the Recipe
    • Separating Methods

    1 Answer

  • Obayanju Damilare
    Obayanju Damilare
    3,383 Points

    when do we use self ?? thanks for your answer

    Posted October 30, 2016 3:19am by Obayanju Damilare
    Obayanju Damilare
    3,383 Points
    • PHP
    • Object-Oriented PHP Basics
    • Building the Recipe
    • Separating Methods

    2 Answers

  • Jonathan Grieve
    Jonathan Grieve
    91,254 Points

    listIngredients function not showing up on output

    Posted September 10, 2016 9:00pm by Jonathan Grieve
    Jonathan Grieve
    91,254 Points
    • PHP
    • Object-Oriented PHP Basics
    • Building the Recipe
    • Separating Methods

    2 Answers

  • Siddhant Mehta
    PLUS
    Siddhant Mehta
    Courses Plus Student 478 Points

    Static function

    Posted July 13, 2016 3:50am by Siddhant Mehta
    Siddhant Mehta
    Courses Plus Student 478 Points
    • PHP
    • Object-Oriented PHP Basics
    • Building the Recipe
    • Separating Methods

    1 Answer

  • jinhwa yoo
    jinhwa yoo
    10,042 Points

    help me

    Posted July 1, 2016 5:38am by jinhwa yoo
    jinhwa yoo
    10,042 Points
    • PHP
    • Object-Oriented PHP Basics
    • Building the Recipe
    • Separating Methods

    2 Answers

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

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
SEE ALL

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
SEE ALL

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
SEE ALL

About Us

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

Explore

  • Plans
  • Affiliates
  • Perks
  • Shop
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses

Treehouse is an online technology education platform founded in 2011. Treehouse offers more than 700 self-paced, video-based courses in web development, programming, data analysis, design, and AI, plus two project-based bootcamp programs in Front End Web Development and Full Stack JavaScript. Individual Treehouse plans start at $25 per month and include a 7-day free trial. Treehouse serves individual learners, businesses, schools, and public libraries. Cardholders at participating U.S. public libraries can use Treehouse for free. Select Treehouse courses, offered with University Pathways International, are recommended for college credit by ACE and NCCRS. Treehouse learners earn digital certificates for completed Tracks.

Terms & Conditions · Privacy · © 2026 Treehouse Island, Inc.
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
  • Discord