How can the use of eval in PHP impact system performance and security?

Using eval in PHP can impact system performance because it dynamically evaluates a string as PHP code at runtime, which can be slower compared to directly executing code. Additionally, eval can pose a security risk as it allows for arbitrary code execution, making it vulnerable to code injection attacks. To improve performance and security, it is recommended to avoid using eval whenever possible and find alternative solutions.

// Avoid using eval in PHP