What potential pitfalls should be aware of when configuring Apache, PHP, and MySQL for web development?

One potential pitfall to be aware of when configuring Apache, PHP, and MySQL for web development is security vulnerabilities. It is important to ensure that all software components are kept up to date with the latest security patches to prevent potential exploits. Additionally, properly configuring permissions and access controls for files and databases can help mitigate security risks.

// Example of setting secure file permissions in PHP
chmod("/path/to/file", 0644);