What are some security considerations to keep in mind when working with PHP code that interacts with databases?

One important security consideration when working with PHP code that interacts with databases is to prevent SQL injection attacks. This can be done by using prepared statements or parameterized queries to sanitize user input before executing SQL queries. Additionally, it's important to restrict database user permissions to only what is necessary for the application to function properly. 

// Using prepared statements to prevent SQL injection
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $username);
$stmt->execute();
```

```php
// Restricting database user permissions
GRANT SELECT, INSERT, UPDATE, DELETE ON database.* TO 'username'@'localhost' IDENTIFIED BY 'password';

Keywords

SQL injection prepared statements PDO encryption input validation

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