What are the potential drawbacks of using eval() in PHP code, and are there alternative methods to achieve the same result?

Using eval() in PHP code can pose security risks as it allows arbitrary code execution, making it vulnerable to injection attacks. An alternative method to achieve the same result is to use built-in PHP functions like `include` or `require` for executing external code or expressions.

// Using include or require instead of eval

$code = 'echo "Hello, World!";';
eval($code); // Using eval() - potential security risk

// Alternative method using include
$code = 'echo "Hello, World!";';
file_put_contents('temp.php', '<?php ' . $code);
include 'temp.php';
unlink('temp.php');