Script execution and memory reset in PHP

Introduction

PHP runs your code from top to bottom each time you visit a page. After the script finishes, all temporary data is cleared to keep things fresh and fast.

When you want to run a web page that shows updated information every time someone visits.

When you need to make sure old data does not stick around between page loads.

When you want to understand why variables lose their values after the page reloads.

Syntax

PHP

<?php
// Your PHP code here
?>

PHP scripts start with <?php and end with ?>.

Each time the script runs, all variables and memory are reset.

Examples

This script sets a variable and prints it. Each time you reload, it starts fresh with 1.

PHP

<?php
$counter = 1;
echo $counter;
?>

This script increases the counter by one and prints 2. But on reload, it resets back to 1 before adding one again.

PHP

<?php
$counter = 1;
$counter++;
echo $counter;
?>

Sample Program

This program shows how the visit count resets every time the page reloads because PHP clears memory after each run.

PHP

<?php
$visits = 1;
$visits++;
echo "Visit number: $visits";
?>

Important Notes

PHP does not remember variable values between page loads unless you use sessions or databases.

Each script run is like a fresh start, so variables are created and destroyed every time.

Summary

PHP scripts run from top to bottom each time you load the page.

All variables and memory reset after the script finishes.

This keeps your web pages fast and clean for every visitor.