Php

WEB DEVELOPMENT PHP LAB

1. Write the process of installation of web server.

Installing a web server with PHP typically involves a few steps. Here's a general guide for installing a common web server, Apache, with PHP. Please note that specific steps may vary based on your operating system. This guide assumes you are using a Linux distribution, but similar steps can be applied to other operating systems.

Installing Apache and PHP on Linux:

Update Package Lists:

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sudo apt update

Install Apache:

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sudo apt install apache2

Install PHP and Mod for Apache:

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sudo apt install php libapache2-mod-php

Restart Apache:

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sudo systemctl restart apache2

Test PHP:

Create a PHP info file to test if PHP is working:

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echo "<?php phpinfo(); ?>" | sudo tee /var/www/html/info.php

Open a web browser and navigate to http://localhost/info.php or http://your_server_ip/info.php. If PHP is working, you'll see the PHP information page.

Additional Steps (Optional):

Install MySQL:

If your application requires a database, you might want to install MySQL or another database server.

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sudo apt install mysql-server

Install phpMyAdmin (Optional):

To manage your MySQL databases via a web interface:

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sudo apt install phpmyadmin

Follow the setup process, and then access phpMyAdmin at http://localhost/phpmyadmin or http://your_server_ip/phpmyadmin.

Installing on Windows or macOS:

Windows:

You can use software packages like XAMPP or WampServer that bundle Apache, PHP, MySQL, and phpMyAdmin into a single installer.

macOS:

You can use MAMP or Homebrew to install Apache, PHP, and MySQL.

Configuration:

Apache's configuration files are usually located in /etc/apache2/ on Linux. You can configure virtual hosts, modules, and other settings in these files.

PHP configuration is typically in /etc/php/ directory.

Remember to follow the security best practices for your environment, such as setting up firewalls, securing database servers, and keeping software up-to-date. The specific steps might vary based on your distribution or operating system, so refer to the documentation for your specific environment for more accurate instructions.

2. Write programs to print all details of your php server. Use phpinfoO.

To retrieve and display all details about your PHP server, you can create a simple PHP script that utilizes the phpinfo() function. Create a file, for example, phpinfoO.php, and add the following code:

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<?php

// phpinfoO.php

// Output all information about PHP

phpinfo();

Save this file in your web server's document root directory. Then, you can access it through a web browser by navigating to http://your_server_ip/phpinfoO.php or http://localhost/phpinfoO.php.

This script will display a comprehensive overview of your PHP configuration, modules, server information, and more. Note that exposing such detailed information about your server may pose security risks, so be cautious about making this information publicly accessible. It's recommended to remove or secure this file once you have gathered the necessary information.

3. Write a program to give demo of ECHO and PRINT command.

Certainly! Both echo and print are used in PHP to output data to the browser or console. Here's a simple PHP script that demonstrates the use of echo and print:

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<?php

// echoPrintDemo.php

// Using echo to output text

echo "Hello, this is a demonstration of the echo command. ";

// Using echo to output variables

$variable = "PHP is powerful!";

echo $variable;

// Using print to output text

print "<br>This is a demonstration of the print command. ";

// Using print to output variables

$anotherVariable = "Both echo and print can be used to display text.";

print $anotherVariable;

Save this file, for example, as echoPrintDemo.php, in your web server's document root directory. Then, access it through a web browser by navigating to http://your_server_ip/echoPrintDemo.php or http://localhost/echoPrintDemo.php.

This script demonstrates the use of both echo and print to output text and variables. Note that echo can take multiple parameters separated by commas, while print can only take one parameter. In practice, echo is more commonly used for its simplicity and flexibility.

4. Write a program to implement the string functions .

Certainly! PHP provides a wide range of string functions that allow you to manipulate and work with strings efficiently. Here's a simple PHP script that demonstrates some common string functions:

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<?php

// stringFunctionsDemo.php

// String declaration

$string = "Hello, World! This is a PHP string functions demo.";

// 1. String Length

$length = strlen($string);

echo "1. String Length: " . $length . "<br>";

// 2. String to Uppercase

$uppercaseString = strtoupper($string);

echo "2. Uppercase: " . $uppercaseString . "<br>";

// 3. String to Lowercase

$lowercaseString = strtolower($string);

echo "3. Lowercase: " . $lowercaseString . "<br>";

// 4. Substring

$substring = substr($string, 0, 10); // Get the first 10 characters

echo "4. Substring: " . $substring . "<br>";

// 5. String Replace

$replacedString = str_replace("PHP", "JavaScript", $string);

echo "5. String Replace: " . $replacedString . "<br>";

// 6. String Concatenation

$concatenatedString = $string . " " . $uppercaseString;

echo "6. Concatenation: " . $concatenatedString . "<br>";

// 7. String Trim

$whitespaceString = " Trim this string ";

$trimmedString = trim($whitespaceString);

echo "7. String Trim: " . $trimmedString . "<br>";

// 8. String Position

$position = strpos($string, "PHP");

echo "8. String Position of 'PHP': " . $position . "<br>";

// 9. String Repeat

$repeatedString = str_repeat("Repeat ", 3);

echo "9. String Repeat: " . $repeatedString . "<br>";

// 10. String Shuffle

$shuffledString = str_shuffle($string);

echo "10. String Shuffle: " . $shuffledString . "<br>";

// Feel free to explore more PHP string functions as needed.

Save this file, for example, as stringFunctionsDemo.php, in your web server's document root directory. Access it through a web browser by navigating to http://your_server_ip/stringFunctionsDemo.php or http://localhost/stringFunctionsDemo.php.

This script showcases various string functions in PHP, but there are many more available. Refer to the official PHP documentation for a comprehensive list and details on each string function.

5. Write a program to print Fibonacci series upto given number.

Certainly! Here's a simple PHP program that prints the Fibonacci series up to a given number:

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<?php

// fibonacciSeries.php

// Function to generate Fibonacci series up to a given number

function generateFibonacci($n) {

$fibonacciSeries = array(0, 1);

for ($i = 2; $i < $n; $i++) {

$fibonacciSeries[$i] = $fibonacciSeries[$i - 1] + $fibonacciSeries[$i - 2];

}

return $fibonacciSeries;

}

// Given number to generate Fibonacci series up to

$givenNumber = 10;

// Call the function

$fibonacciSeries = generateFibonacci($givenNumber);

// Print the Fibonacci series

echo "Fibonacci series up to {$givenNumber} : " . implode(", ", $fibonacciSeries);

Save this file as fibonacciSeries.php in your web server's document root directory. Access it through a web browser by navigating to http://your_server_ip/fibonacciSeries.php or http://localhost/fibonacciSeries.php.

In this example, the generateFibonacci function generates the Fibonacci series up to the given number ($n). The series is then printed using echo. You can change the value of $givenNumber to generate the Fibonacci series up to a different number.

6. Write a menu driven program to implement a calculator

which performs only addition, subtraction, multiplication

and division. The operation should happen based on user

choice.

Certainly! Here's a simple menu-driven PHP calculator program that performs addition, subtraction, multiplication, and division based on user input:

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<?php

// calculator.php

// Function to perform addition

function add($num1, $num2) {

return $num1 + $num2;

}

// Function to perform subtraction

function subtract($num1, $num2) {

return $num1 - $num2;

}

// Function to perform multiplication

function multiply($num1, $num2) {

return $num1 * $num2;

}

// Function to perform division

function divide($num1, $num2) {

// Check if the denominator is not zero to avoid division by zero

if ($num2 != 0) {

return $num1 / $num2;

} else {

return "Cannot divide by zero";

}

// Display menu and get user choice

echo "Simple Calculator\n";

echo "1. Addition\n";

echo "2. Subtraction\n";

echo "3. Multiplication\n";

echo "4. Division\n";

echo "Enter your choice (1-4): ";

$userChoice = readline();

// Get user input for numbers

echo "Enter first number: ";

$num1 = readline();

echo "Enter second number: ";

$num2 = readline();

// Perform calculation based on user choice

switch ($userChoice) {

case 1:

$result = add($num1, $num2);

echo "Result: {$num1} + {$num2} = {$result}\n";

break;

case 2:

$result = subtract($num1, $num2);

echo "Result: {$num1} - {$num2} = {$result}\n";

break;

case 3:

$result = multiply($num1, $num2);

echo "Result: {$num1} * {$num2} = {$result}\n";

break;

case 4:

$result = divide($num1, $num2);

echo "Result: {$num1} / {$num2} = {$result}\n";

break;

default:

echo "Invalid choice. Please enter a number between 1 and 4.\n";

}

Save this file as calculator.php and run it in a PHP environment. The program will prompt the user to select an operation and enter two numbers, and then it will display the result based on the chosen operation.

7. Write a program sort ten number by using array.

Certainly! Below is a simple PHP program that sorts an array of ten numbers using the sort() function:

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<?php

// sortNumbers.php

// Array of ten numbers

$numbers = array(5, 2, 8, 1, 9, 3, 7, 4, 10, 6);

// Display the original array

echo "Original Array: " . implode(", ", $numbers) . "\n";

// Sort the array in ascending order

sort($numbers);

// Display the sorted array

echo "Sorted Array: " . implode(", ", $numbers) . "\n";

Save this file as sortNumbers.php in your web server's document root directory. Access it through a web browser by navigating to http://your_server_ip/sortNumbers.php or http://localhost/sortNumbers.php.

This program initializes an array of ten numbers, sorts them in ascending order using the sort() function, and then displays the original and sorted arrays. You can customize the array with your own set of numbers if needed.

8. Write a program to demonstrate the concept of associative

array.

Certainly! In PHP, an associative array is an array that uses named keys instead of numerical indices. Here's a simple program that demonstrates the concept of associative arrays:

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<?php

// associativeArrayDemo.php

// Creating an associative array

$student = array(

"name" => "John Doe",

"age" => 20,

"grade" => "A",

"subjects" => array("Math", "English", "Science")

);

// Accessing and displaying elements of the associative array

echo "Student Name: " . $student["name"] . "\n";

echo "Age: " . $student["age"] . "\n";

echo "Grade: " . $student["grade"] . "\n";

echo "Subjects: " . implode(", ", $student["subjects"]) . "\n";

// Modifying an element in the associative array

$student["age"] = 21;

// Adding a new element to the associative array

$student["address"] = "123 Main St";

// Displaying the modified associative array

echo "\nModified Student Information:\n";

echo "Student Name: " . $student["name"] . "\n";

echo "Age: " . $student["age"] . "\n";

echo "Grade: " . $student["grade"] . "\n";

echo "Subjects: " . implode(", ", $student["subjects"]) . "\n";

echo "Address: " . $student["address"] . "\n";

Save this file as associativeArrayDemo.php in your web server's document root directory. Access it through a web browser by navigating to http://your_server_ip/associativeArrayDemo.php or http://localhost/associativeArrayDemo.php.

In this program, an associative array named $student is created with keys such as "name," "age," "grade," and "subjects." The program then demonstrates how to access, modify, and add elements to the associative array. Associative arrays are useful for organizing data with named keys for better readability and understanding of the data structure.

9. Write a program to demonstrate thle concept of multidimensional array.

Certainly! In PHP, a multidimensional array is an array that contains one or more arrays as its elements. Here's a simple program that demonstrates the concept of a multidimensional array:

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<?php

// multidimensionalArrayDemo.php

// Creating a multidimensional array

$students = array(

array("name" => "John Doe", "age" => 20, "grade" => "A", "subjects" => array("Math", "English", "Science")),

array("name" => "Jane Smith", "age" => 22, "grade" => "B", "subjects" => array("History", "Art", "Physics")),

array("name" => "Bob Johnson", "age" => 21, "grade" => "C", "subjects" => array("Chemistry", "Geography", "Music"))

);

// Accessing and displaying elements of the multidimensional array

echo "Student 1:\n";

echo "Name: " . $students[0]["name"] . "\n";

echo "Age: " . $students[0]["age"] . "\n";

echo "Grade: " . $students[0]["grade"] . "\n";

echo "Subjects: " . implode(", ", $students[0]["subjects"]) . "\n";

echo "\nStudent 2:\n";

echo "Name: " . $students[1]["name"] . "\n";

echo "Age: " . $students[1]["age"] . "\n";

echo "Grade: " . $students[1]["grade"] . "\n";

echo "Subjects: " . implode(", ", $students[1]["subjects"]) . "\n";

echo "\nStudent 3:\n";

echo "Name: " . $students[2]["name"] . "\n";

echo "Age: " . $students[2]["age"] . "\n";

echo "Grade: " . $students[2]["grade"] . "\n";

echo "Subjects: " . implode(", ", $students[2]["subjects"]) . "\n";

Save this file as multidimensionalArrayDemo.php in your web server's document root directory. Access it through a web browser by navigating to http://your_server_ip/multidimensionalArrayDemo.php or http://localhost/multidimensionalArrayDemo.php.

In this program, a multidimensional array named $students is created with three sub-arrays, each representing a student's information. The program then demonstrates how to access and display elements of the multidimensional array. Multidimensional arrays are useful for representing tabular data or nested structures.

10. Write a program to demonstrate the concept of Classes &

and objects. Create a "password". login form When with user two enters text fields "Kalinga called "`as a "login" user .

Certainly! Below is an example of a simple PHP program that demonstrates the concept of classes and objects by creating a basic login form with a "User" class:

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<?php

// User.php

class User {

private $username;

private $password;

// Constructor to initialize the username and password

public function __construct($username, $password) {

$this->username = $username;

$this->password = $password;

}

// Method to validate login credentials

public function validateLogin($enteredUsername, $enteredPassword) {

if ($enteredUsername == $this->username && $enteredPassword == $this->password) {

return true;

} else {

return false;

}

// Usage of the User class

$user = new User("Kalinga", "called");

// Check if form is submitted

if ($_SERVER["REQUEST_METHOD"] == "POST") {

// Get user input from the form

$enteredUsername = $_POST["username"];

$enteredPassword = $_POST["password"];

// Validate login credentials using the User class

if ($user->validateLogin($enteredUsername, $enteredPassword)) {

echo "Login successful! Welcome, {$enteredUsername}.";

} else {

echo "Invalid username or password. Please try again.";

}

<!DOCTYPE html>

<head>

<title>Login Form</title>

</head>

<body>

<h2>Login Form</h2>

<label for="username">Username:</label>

<label for="password">Password:</label>

</form>

</body>

</html>

Save this file as loginForm.php in your web server's document root directory. Access it through a web browser by navigating to http://your_server_ip/loginForm.php or http://localhost/loginForm.php.

This program defines a User class with a constructor to set the username and password and a method (validateLogin) to validate login credentials. The HTML part of the code creates a simple login form with fields for entering the username and password. The PHP part checks the submitted form data against the predefined username and password in the User class and displays a success or error message accordingly.

11. Name and "University" as a password it should be redirected to a Welcome.HTML page or toSorry.HTML in

case of wrong username/password .

Certainly! Below is an updated version of the PHP program that redirects to different pages based on the entered username and password:

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<?php

// User.php

class User {

private $username;

private $password;

// Constructor to initialize the username and password

public function __construct($username, $password) {

$this->username = $username;

$this->password = $password;

}

// Method to validate login credentials

public function validateLogin($enteredUsername, $enteredPassword) {

return ($enteredUsername == $this->username && $enteredPassword == $this->password);

}

// Usage of the User class

$user = new User("name", "University");

// Check if form is submitted

if ($_SERVER["REQUEST_METHOD"] == "POST") {

// Get user input from the form

$enteredUsername = $_POST["username"];

$enteredPassword = $_POST["password"];

// Validate login credentials using the User class

if ($user->validateLogin($enteredUsername, $enteredPassword)) {

// Redirect to Welcome.HTML on successful login

header("Location: Welcome.HTML");

exit();

} else {

// Redirect to Sorry.HTML on invalid credentials

header("Location: Sorry.HTML");

exit();

}

<!DOCTYPE html>

<head>

<title>Login Form</title>

</head>

<body>

<h2>Login Form</h2>

<label for="username">Username:</label>

<label for="password">Password:</label>

</form>

</body>

</html>

In this version, after validating the login credentials, the program uses the header function to redirect to either "Welcome.HTML" or "Sorry.HTML" based on whether the login is successful or not. Make sure to replace "Welcome.HTML" and "Sorry.HTML" with the actual file names or paths you intend to use. Also, ensure that there is no output (including whitespace) before the header function is called to avoid issues with redirection.

12. Create a database in MySql and connect that database from PHP.

To create a MySQL database and connect to it using PHP, you need to follow these steps:

Step 1: Create a MySQL Database

You can use a MySQL client or a tool like phpMyAdmin to create a database. Here's an example using MySQL command line:

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CREATE DATABASE mydatabase;

Replace "mydatabase" with your desired database name.

Step 2: Create a Table

Let's create a simple table within the database:

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USE mydatabase;

CREATE TABLE users (

id INT AUTO_INCREMENT PRIMARY KEY,

username VARCHAR(50),

password VARCHAR(50)

);

Step 3: PHP Connection

Now, you can create a PHP script to connect to the MySQL database:

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<?php

// db_connection.php

$hostname = 'localhost'; // Replace with your MySQL server hostname

$username = 'root'; // Replace with your MySQL username

$password = ''; // Replace with your MySQL password

$database = 'mydatabase'; // Replace with your MySQL database name

// Create connection

$conn = new mysqli($hostname, $username, $password, $database);

// Check connection

if ($conn->connect_error) {

die("Connection failed: " . $conn->connect_error);

}

echo "Connected successfully";

Replace the values of $hostname, $username, $password, and $database with your MySQL server details.

Step 4: Test the Connection

Create another PHP script to test the database connection:

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<?php

// test_connection.php

include 'db_connection.php'; // Include the connection script

// Perform a simple query to test the connection

$query = "SELECT * FROM users";

$result = $conn->query($query);

if ($result) {

echo "Query executed successfully!";

} else {

echo "Error executing query: " . $conn->error;

}

// Close the connection

$conn->close();

Place both scripts (db_connection.php and test_connection.php) in your web server's document root directory. Access test_connection.php through a web browser to see if the connection is successful.

Make sure to replace the database details and credentials with your actual MySQL server details. Additionally, consider using secure practices for database access, such as using a separate user with limited privileges and avoiding hardcoding sensitive information in your scripts.

13. Write a program to Update, insert and delete the values of table in database

Certainly! Below is an example PHP script that demonstrates how to update, insert, and delete values in a MySQL database table:

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<?php

// db_connection.php

$hostname = 'localhost'; // Replace with your MySQL server hostname

$username = 'root'; // Replace with your MySQL username

$password = ''; // Replace with your MySQL password

$database = 'mydatabase'; // Replace with your MySQL database name

// Create connection

$conn = new mysqli($hostname, $username, $password, $database);

// Check connection

if ($conn->connect_error) {

die("Connection failed: " . $conn->connect_error);

}

<?php

// update_insert_delete.php

include 'db_connection.php'; // Include the connection script

// Update data in the table

$updateQuery = "UPDATE users SET password = 'newpassword' WHERE username = 'john_doe'";

if ($conn->query($updateQuery) === TRUE) {

echo "Record updated successfully<br>";

} else {

echo "Error updating record: " . $conn->error . "<br>";

}

// Insert data into the table

$insertQuery = "INSERT INTO users (username, password) VALUES ('new_user', 'new_user_password')";

if ($conn->query($insertQuery) === TRUE) {

echo "Record inserted successfully<br>";

} else {

echo "Error inserting record: " . $conn->error . "<br>";

}

// Delete data from the table

$deleteQuery = "DELETE FROM users WHERE username = 'old_user'";

if ($conn->query($deleteQuery) === TRUE) {

echo "Record deleted successfully<br>";

} else {

echo "Error deleting record: " . $conn->error . "<br>";

}

// Close the connection

$conn->close();

In this example:

The update_insert_delete.php script includes the database connection script (db_connection.php).

It updates a user's password in the users table.

It inserts a new user into the users table.

It deletes an old user from the users table.

Make sure to replace the database details and credentials with your actual MySQL server details. Additionally, customize the table and column names according to your database schema.

Remember to handle database operations with caution, especially when dealing with user input, to prevent SQL injection. Consider using prepared statements or parameterized queries for more secure interactions with the database.

14. Create a form with a text box asking to enter your favorite city with a submit button when the user enters the city and clicks the submit button another php page should be opened displaying "-Welcome to the city" .

Certainly! Below is an example of a simple PHP program that includes an HTML form asking the user to enter their favorite city. Upon submission, another PHP page is opened, displaying a welcome message to the entered city:

Form Page (city_form.php):

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<!DOCTYPE html>

<head>

<title>Favorite City Form</title>

</head>

<body>

<h2>Enter Your Favorite City</h2>

<label for="city">Favorite City:</label>

</form>

</body>

</html>

Welcome Page (welcome_city.php):

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<?php

if ($_SERVER["REQUEST_METHOD"] == "POST") {

// Get the entered city from the form

$favoriteCity = $_POST["city"];

// Display the welcome message

echo "<h2>Welcome to {$favoriteCity}!</h2>";

} else {

// If accessed directly without submitting the form, redirect to the form page

header("Location: city_form.php");

exit();

}

Save these files in your web server's document root directory. Access the city_form.php page through a web browser by navigating to http://your_server_ip/city_form.php or http://localhost/city_form.php.

Enter your favorite city in the form, click the submit button, and you will be redirected to the welcome_city.php page displaying a welcome message to the entered city. If you access welcome_city.php directly without submitting the form, it will redirect you to the form page.

15. Write a program to design login form in which find the greatest number amongst three numbers .

Certainly! Below is an example of a PHP program that designs a login form and, upon successful login, finds the greatest number among three input numbers:

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<!DOCTYPE html>

<head>

<title>Login and Number Comparison</title>

</head>

<body>

<?php

// Check if form is submitted

if ($_SERVER["REQUEST_METHOD"] == "POST") {

// Get user input from the form

$username = $_POST["username"];

$password = $_POST["password"];

// Validate login credentials (for demonstration purposes)

if ($username == "user" && $password == "pass") {

// If login is successful, display the number comparison form

echo "<h2>Welcome, {$username}!</h2>";

<h3>Find the Greatest Number</h3>

<label for="num1">Number 1:</label>

<label for="num2">Number 2:</label>

<label for="num3">Number 3:</label>

</form>

<?php

// Check if the number comparison form is submitted

if ($_SERVER["REQUEST_METHOD"] == "POST") {

// Get the entered numbers

$num1 = $_POST["num1"];

$num2 = $_POST["num2"];

$num3 = $_POST["num3"];

// Find the greatest number

$greatestNumber = max($num1, $num2, $num3);

// Display the result

echo "<p>The greatest number among {$num1}, {$num2}, and {$num3} is: {$greatestNumber}</p>";

}

<?php

} else {

// If login fails, display an error message

echo "<p>Invalid username or password. Please try again.</p>";

}

<h2>Login Form</h2>

<label for="username">Username:</label>

<label for="password">Password:</label>

</form>

</body>

</html>

In this example, the program first displays a login form. If the login is successful (for demonstration purposes, using hardcoded credentials), it shows a form to input three numbers. After submitting the number comparison form, it calculates and displays the greatest number among the entered numbers.

Save this file as login_and_compare.php in your web server's document root directory. Access it through a web browser by navigating to http://your_server_ip/login_and_compare.php or http://localhost/login_and_compare.php.

16. WAP for Marksheet generation.

Certainly! Below is an example of a PHP program that generates a marksheet based on the input of student details and marks. The program calculates the total marks, percentage, and grade and displays them in the marksheet:

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<!DOCTYPE html>

<head>

<title>Marksheet Generation</title>

</head>

<body>

<?php

// Check if the form is submitted

if ($_SERVER["REQUEST_METHOD"] == "POST") {

// Get student details and marks from the form

$studentName = $_POST["student_name"];

$rollNumber = $_POST["roll_number"];

$subject1 = $_POST["subject1"];

$subject2 = $_POST["subject2"];

$subject3 = $_POST["subject3"];

// Calculate total marks, percentage, and grade

$totalMarks = $subject1 + $subject2 + $subject3;

$percentage = ($totalMarks / 300) * 100;

// Determine the grade based on percentage

if ($percentage >= 90) {

$grade = 'A';

} elseif ($percentage >= 80) {

$grade = 'B';

} elseif ($percentage >= 70) {

$grade = 'C';

} elseif ($percentage >= 60) {

$grade = 'D';

} else {

$grade = 'F';

}

<h2>Marksheet</h2>

<p><strong>Student Name:</strong> <?php echo $studentName; ?></p>

<p><strong>Roll Number:</strong> <?php echo $rollNumber; ?></p>

<p><strong>Subject 1 Marks:</strong> <?php echo $subject1; ?></p>

<p><strong>Subject 2 Marks:</strong> <?php echo $subject2; ?></p>

<p><strong>Subject 3 Marks:</strong> <?php echo $subject3; ?></p>

<p><strong>Total Marks:</strong> <?php echo $totalMarks; ?></p>

<p><strong>Percentage:</strong> <?php echo number_format($percentage, 2) . '%'; ?></p>

<p><strong>Grade:</strong> <?php echo $grade; ?></p>

<?php

} else {

<h2>Enter Student Details and Marks</h2>

<label for="student_name">Student Name:</label>

<label for="roll_number">Roll Number:</label>

<label for="subject1">Subject 1 Marks:</label>

<label for="subject2">Subject 2 Marks:</label>

<label for="subject3">Subject 3 Marks:</label>

</form>

<?php

}

</body>

</html>

Save this file as marksheet.php in your web server's document root directory. Access it through a web browser by navigating to http://your_server_ip/marksheet.php or http://localhost/marksheet.php.

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