Real-World Examples

🔐 A) Login System (If-Else + Ternary)

<?php
$username = "admin";
$password = "1234";$inputUser = "admin";
$inputPass = "1234";if ($inputUser === $username && $inputPass === $password) {
    echo "Login Successful ✅";
} else {
    echo "Invalid Credentials ❌";
}
?>

🔹 With Ternary (short version):

echo ($inputUser === $username && $inputPass === $password)
    ? "Login Successful ✅"
    : "Invalid Credentials ❌";

---

📝 B) Form Validation (If-Else + Empty Check)

<?php
$name = $_POST['name'] ?? '';
$email = $_POST['email'] ?? '';if (empty($name)) {
    echo "Name is required ❗";
} elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "Invalid Email ❗";
} else {
    echo "Form Submitted Successfully ✅";
}
?>

---

🎯 C) Role-Based Access (Switch Case)

<?php
$role = "admin";switch ($role) {
    case "admin":
        echo "Full Access";
        break;
    case "editor":
        echo "Edit Access";
        break;
    case "user":
        echo "View Only";
        break;
    default:
        echo "No Access";
}
?>

---

⚡ D) Modern Role System (Match – PHP 8+)

<?php
$role = "editor";$access = match($role) {
    "admin" => "Full Access",
    "editor" => "Edit Access",
    "user" => "View Only",
    default => "No Access",
};echo $access;
?>