What are the key differences in security considerations when migrating to a server with PHP5 and MySQL5?

When migrating to a server with PHP5 and MySQL5, one key security consideration is to ensure that your code is updated to use the latest security features and best practices for both PHP and MySQL. This includes using parameterized queries to prevent SQL injection attacks, validating and sanitizing user input, and implementing proper access control measures. 

// Example of using parameterized queries in PHP to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->bindParam(':username', $username);
$stmt->execute();
```

```php
// Example of validating and sanitizing user input in PHP
$username = filter_var($_POST['username'], FILTER_SANITIZE_STRING);
```

```php
// Example of implementing access control measures in PHP
if($_SESSION['role'] !== 'admin'){
    die('Access denied');
}

Keywords

PHP5 MySQL5 security considerations server migration key differences

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