Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.


error message after commenting

My code :


  // This is my name 
  $name = "Eph ";

  // $location = "Orlando, FL";
  $full_name = "Mike The Frog";
  $name = $full_name;


<!DOCTYPE html>
    <meta charset=utf-8>
    <title><?php echo $name ?>| Treehouse Profile</title>
    <link href="css/style.css" rel="stylesheet" />

    <section class="sidebar text-center">
      <div class="avatar">
        <img src="img/avatar.png" alt="Mike The Frog" title="<?php echo $name ?>">
      <h1><?php echo $name ?></h1>
      <p><? echo $location ?></p>
      <hr />
      <p>Welcome to PHP Basics!</p>
      <hr />
      <ul class="social">
        <li><a href=""><span class="icon twitter"></span></a></li>
    <section class="main">
      <p>Let's Get Started!</p>
      <p><?php echo "Hello World" ?></p>

After I commented the $location variable this error message shows up

Notice: Undefined variable: location in /home/treehouse/workspace/index.php on line 27

2 Answers

Erik S.
Erik S.
9,789 Points

This line is missing a php:

<p><? echo $location ?></p>

<p><?php echo $location ?></p>
Jeff Lemay
Jeff Lemay
14,267 Points

You're trying to echo a variable that does not exist. You can write a conditional to check if the variable exists and then echo it if so:

<p><?php if($location) { echo $location; } ?></p>

You'd have to use isset() for that.

if(isset($location)) { echo $location; }
Jeff Lemay
Jeff Lemay
14,267 Points

Thank you for that, Jason. You also wouldn't wrap the paragraph in php tags...

<p><?php if(isset($location)) { echo $location; } ?></p>