Why variables do not persist between requests in PHP - See It in Action

Why Variables Do Not Persist Between Requests

📖 Scenario: Imagine you are building a simple web counter that counts how many times a user visits a page. You want to understand why a variable that stores the count resets every time the page reloads.

🎯 Goal: Learn why variables in PHP do not keep their values between page loads and how to observe this behavior with a simple example.

📋 What You'll Learn

Create a PHP variable called visitCount and set it to 0

Create a PHP variable called increment and set it to 1

Add the increment value to visitCount

Print the value of visitCount to show it resets on each page load

💡 Why This Matters

🌍 Real World

Web developers often need to remember user data between page visits, like login status or shopping cart items.

💼 Career

Understanding why variables reset helps developers choose the right method to store data persistently in web applications.

1

Create the initial variable visitCount

Create a PHP variable called visitCount and set it to 0.

PHP

$visitCount = 0;
# Your code here

Need a hint?

Use the $ sign to create a variable in PHP.

2

Create a variable increment to add to visitCount

Create a PHP variable called increment and set it to 1.

PHP

<?php
$visitCount = 0;
$increment = 1;
# Your code here

Need a hint?

Remember to use $increment as the variable name and assign it the value 1.

3

Add increment to visitCount

Add the value of increment to visitCount using $visitCount += $increment;.

PHP

<?php
$visitCount = 0;
$increment = 1;
$visitCount += $increment;
# Your code here

Need a hint?

Use the += operator to add $increment to $visitCount.

4

Print the value of visitCount

Print the value of visitCount using echo $visitCount; to show it resets on each page load.

PHP

<?php
$visitCount = 0;
$increment = 1;
$visitCount += $increment;
echo $visitCount;
# Your code here

Need a hint?

Use echo to display the value of $visitCount.