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In this section, we cover the fundamental aspects of database & mysql integration. You'll learn core concepts, see real-world examples, and understand how to apply them in your projects.

Database & MySQL Integration - Code Example

Example

<?php
// PDO Database connection
try {
    $pdo = new PDO("mysql:host=localhost;dbname=myapp", "root", "password");
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    
    // Prepared statement (prevents SQL injection)
    $stmt = $pdo->prepare("SELECT * FROM users WHERE age > :age");
    $stmt->execute([":age" => 18]);
    $users = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    foreach ($users as $user) {
        echo "{$user['name']}: {$user['email']}\n";
    }
    
    // Insert
    $stmt = $pdo->prepare("INSERT INTO users (name, email) VALUES (?, ?)");
    $stmt->execute(["Alice", "alice@example.com"]);
    echo "Inserted ID: " . $pdo->lastInsertId() . "\n";
} catch (PDOException $e) {
    echo "Error: " . $e->getMessage() . "\n";
}
?>

Try It Yourself: Database & MySQL Integration

Try It Yourself: Database & MySQL IntegrationJavaScript⚠ 1 error

⚠ Syntax Issues (1)

Line 1: JS Error: Unexpected token '<'

💡 Missing or extra {}()[] or operator near the error.

JavaScript Editor

✕ 1 errorTab = 2 spaces

<?php
// Database helper class
class Database {
    private PDO $pdo;
    
    public function __construct(string $dsn, string $user, string $pass) {
        $this->pdo = new PDO($dsn, $user, $pass);
        $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    }
    
    public function query(string $sql, array $params = []): array {
        $stmt = $this->pdo->prepare($sql);
        $stmt->execute($params);
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
    
    public function insert(string $table, array $data): int {
        $cols = implode(",", array_keys($data));
        $placeholders = implode(",", array_fill(0, count($data), "?"));
        $stmt = $this->pdo->prepare("INSERT INTO $table ($cols) VALUES ($placeholders)");
        $stmt->execute(array_values($data));
        return (int)$this->pdo->lastInsertId();
    }
}

echo "Database class ready!\n";
?>

Result

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JavaScript|27 lines|902 chars|1 error, 0 warnings

UTF-8

Database & MySQL Integration - Concepts

Introduction to Database & MySQL Integration

Key Concepts

Database & MySQL Integration - Code Example

Try It Yourself: Database & MySQL Integration

Quick Quiz: Database & MySQL Integration