How to prevent code injection attacks in PHP?

@darrion.kuhn 

1. Use parameterized queries and prepared statements when executing SQL queries. This will prevent malicious input from being interpreted as part of the SQL syntax.
2. Use type hints and data validation to ensure that input is of the expected type and format.
3. Sanitize user input using PHP's filter functions or a custom filter.
4. Use output escaping to ensure that user input is displayed as intended and not as executable code.
5. Use a secure development framework or library that provides built-in protections against code injection attacks.
6. Disable dangerous PHP functions such as eval() and system() that allow for arbitrary code execution.
7. Use strong authentication and permission controls to prevent unauthorized access to sensitive data and functionality.
8. Keep PHP and any supporting libraries up to date with the latest security patches and updates.
9. Run regular security audits and penetration tests to identify and address vulnerabilities in the code.
10. Educate developers on secure coding practices and provide ongoing training to ensure that security remains a priority throughout the development process.