There are several steps involved in creating a Human Resources Management System (HRMS) using PHP. Here is a general outline of the process:

1. Define the requirements: Determine the specific functionality and features you want to include in your HRMS. This may include employee information management, attendance tracking, leave management, performance evaluation, payroll processing, and reporting.

2. Design the database: Create a database schema to store and manage employee data. This may include tables for employee information, attendance records, leave requests, performance evaluations, and payroll data.

3. Develop the user interface: Design and develop the user interface for your HRMS. This can be done using HTML, CSS, and JavaScript. The user interface should allow users to perform tasks such as adding new employees, updating employee information, managing attendance, and processing payroll.

4. Implement the backend functionality: Use PHP to implement the backend functionality of your HRMS. This includes handling database operations like inserting, updating, and retrieving data. You will also need to implement business logic for tasks such as calculating attendance, processing leave requests, and generating payroll reports.

5. Validate and sanitize user input: Make sure to validate and sanitize all user input to prevent any security vulnerabilities like SQL injection or cross-site scripting (XSS) attacks. Use PHP functions like mysqli_real_escape_string() or prepared statements to sanitize user input before using it in database queries.

6. Test and debug: Test your HRMS thoroughly to ensure it functions correctly and meets all the requirements. Use sample data to test different scenarios and validate the output against expected results. Debug any issues or errors that arise during testing.

7. Deploy the HRMS: Once you are satisfied with the functionality and performance of your HRMS, deploy it to a web server or hosting environment. Make sure to secure the application by configuring appropriate access controls and implementing SSL/TLS encryption to protect sensitive data.

8. Provide ongoing support and maintenance: Continuously monitor and maintain the HRMS to ensure it is functioning correctly and meeting the needs of your organization. Regularly update the application to address any security vulnerabilities or bugs that are discovered.