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

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

Curious which AI tools Treehouse developers love? ⚙️ Check them out!

🫡 Treehouse for Military offers discounts to Veterans, service members and their families!

  • Treehouse Logo
  • Plans
    Chevron
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
  • Library
    Chevron
    • All Courses
    • Tracks
  • Techdegree
    Chevron
    • Overview
    • Front End Development
    • Full Stack JavaScript
    • Data Analysis
    • UX Design
    • Python
  • Community
    Chevron
    • 100 Days of Code
    • Live Sessions
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
  • 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
  • Overview Front End Web Development Full Stack JavaScript Python Development Data Analysis UX Design
  • 100 Days of Code Live Sessions Code Adventures Discord Forum Success Stories Treehouse Links
  • 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
      • • 21st Century Skills
      • • AI
      • • Android
      • • APIs
      • • Business
      • • C#
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Equity, Diversity, and Inclusion (EDI)
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • PHP
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
  • Zeljko Porobija
    Zeljko Porobija
    11,491 Points

    There was a problem sending the email: Could not instantiate mail function.

    Posted January 21, 2016 4:08pm by Zeljko Porobija
    Zeljko Porobija
    11,491 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    5 Answers

  • jamescool
    jamescool
    44,592 Points

    potential improvement

    Posted October 14, 2015 1:13am by jamescool
    jamescool
    44,592 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    0 Answers

  • Jonathan Grieve
    MOD
    Jonathan Grieve
    Treehouse Moderator 91,253 Points

    Error messages not displaying

    Posted June 26, 2015 3:53pm by Jonathan Grieve
    Jonathan Grieve
    Treehouse Moderator 91,253 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    4 Answers

  • Frank Novello
    Frank Novello
    19,299 Points

    Why not use else if statements if there was an error? Instead of checking if there was an error for each if statement?

    Posted April 1, 2015 10:32pm by Frank Novello
    Frank Novello
    19,299 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    1 Answer

  • Jared Cain
    PLUS
    Jared Cain
    Courses Plus Student 1,038 Points

    Frog Icon will not leave my "Title" space in localhost!

    Posted February 27, 2015 9:15pm by Jared Cain
    Jared Cain
    Courses Plus Student 1,038 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    1 Answer

  • Stephen Little
    Stephen Little
    8,312 Points

    The CSS style for the error is not working in firefox? anybody know why?

    Posted December 19, 2014 10:22am by Stephen Little
    Stephen Little
    8,312 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    2 Answers

  • Jacob Chatigny-Salit
    Jacob Chatigny-Salit
    14,349 Points

    How can you fix the CSS around the error message in Chrome?

    Posted December 8, 2014 6:23pm by Jacob Chatigny-Salit
    Jacob Chatigny-Salit
    14,349 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    4 Answers

  • ammarkhan
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    ammarkhan
    Front End Web Development Techdegree Student 21,661 Points

    Where is $errorMessage defined?

    Posted October 13, 2014 8:41am by ammarkhan
    .a{fill-rule:evenodd;}techdegree
    ammarkhan
    Front End Web Development Techdegree Student 21,661 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    1 Answer

  • Diego Lazaro
    Diego Lazaro
    4,244 Points

    Move selected text to the right in sublime text2

    Posted August 28, 2014 9:16am by Diego Lazaro
    Diego Lazaro
    4,244 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    3 Answers

  • Michael Wisniewski
    Michael Wisniewski
    8,906 Points

    How would you write the code for Radio Buttons and Checkboxes that must contain a value?

    Posted July 25, 2014 12:27am by Michael Wisniewski
    Michael Wisniewski
    8,906 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    1 Answer

  • Luke Lee
    Luke Lee
    7,577 Points

    Warning: Cannot modify header information - headers already sent by

    Posted March 12, 2014 10:18am by Luke Lee
    Luke Lee
    7,577 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    4 Answers

  • joeboo2529
    joeboo2529
    9,805 Points

    $error_message variable an array

    Posted February 25, 2014 10:04pm by joeboo2529
    joeboo2529
    9,805 Points
    • PHP
    • Enhancing a Simple PHP Application
    • Integrating Validation Errors
    • Displaying the Error Message

    1 Answer

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

© 2024 Treehouse Island, Inc.