PHP Tutorial | KNOWe Platform

KNOWe Learning Module

Learn PHP

Server-side web development with PHP - dynamic pages, form handling, and backend logic.

Start Learning Jump to Mini Project

Why Learn PHP?

Web Focused

Handles forms, sessions, databases, and backend page logic.

Easy to Start

Blends naturally with HTML and basic programming concepts.

PHP Syntax

PHP code runs inside special <?php ?> tags. Try it yourself!

Try PHP Code

Output

Variables

Variables in PHP begin with $ symbol. Try them!

Data Types

PHP supports strings, integers, floats, booleans, and more.

If...Else Conditions

Conditions help PHP make decisions. Try different marks!

Functions

Functions organize reusable code blocks.

Form Handling

PHP can process values submitted from HTML forms (simulated).

In a real PHP environment, form data comes from $_POST or $_GET superglobals.

🎯 Mini Project: Student Result System

<?php
// Student Result Management System
$students = [
    ["name" => "Riya Sharma", "marks" => 92, "subject" => "Mathematics"],
    ["name" => "Aman Patel", "marks" => 78, "subject" => "Physics"],
    ["name" => "Priya Singh", "marks" => 45, "subject" => "Chemistry"],
    ["name" => "Rahul Verma", "marks" => 35, "subject" => "Biology"],
    ["name" => "Neha Gupta", "marks" => 88, "subject" => "Computer Science"]
];

function calculateGrade($marks) {
    if ($marks >= 90) return "A+ (Outstanding)";
    elseif ($marks >= 80) return "A (Excellent)";
    elseif ($marks >= 70) return "B (Very Good)";
    elseif ($marks >= 60) return "C (Good)";
    elseif ($marks >= 40) return "D (Pass)";
    else return "F (Fail)";
}

function getStatus($marks) {
    return $marks >= 40 ? "✅ PASS" : "❌ FAIL";
}

echo "═══════════════════════════════════════════\n";
echo "         STUDENT RESULT REPORT              \n";
echo "═══════════════════════════════════════════\n\n";

foreach($students as $student) {
    $grade = calculateGrade($student['marks']);
    $status = getStatus($student['marks']);
    
    echo "📚 Student: " . $student['name'] . "\n";
    echo "   Subject: " . $student['subject'] . "\n";
    echo "   Marks: " . $student['marks'] . "/100\n";
    echo "   Grade: $grade\n";
    echo "   Status: $status\n";
    echo "───────────────────────────────────────────\n";
}

// Summary statistics
$totalMarks = array_sum(array_column($students, 'marks'));
$average = $totalMarks / count($students);
$passCount = count(array_filter($students, fn($s) => $s['marks'] >= 40));

echo "\n📊 SUMMARY STATISTICS:\n";
echo "   Total Students: " . count($students) . "\n";
echo "   Class Average: " . round($average, 1) . "%\n";
echo "   Pass Percentage: " . round(($passCount / count($students)) * 100) . "%\n";
echo "\n✨ Result system built with PHP!";
?>

PHP Assessment

Test your understanding of PHP fundamentals.

1. PHP is mainly used as a:
Server-side language Spreadsheet tool Design software

2. Which symbol starts a variable in PHP?
# $ @

3. PHP is often used with HTML forms.
True False

Complete the quiz and click submit.

Learner Progress

Track completion of this PHP module.

Course Progress0%

Intro & Why PHP

PHP Syntax & Variables

Data Types & Conditions

Functions & Form Handling

Mini Project (Result System)

Assessment Completed

Next Steps

✓ Revise the examples line by line and modify them
✓ Practice PHP on a local server environment (XAMPP, MAMP)
✓ Try changing the student result mini project logic
✓ Continue to arrays, sessions, cookies, and MySQL database connections
✓ Build a complete CRUD application with PHP and MySQL