A Part-Time PHP Developer is responsible for developing, maintaining, and troubleshooting PHP-based applications on a reduced-hour basis. They typically work on specific projects or provide support as needed, often for startups, small businesses, or companies with flexible work structures. Responsibilities can include writing clean code, debugging, database management, and integrating third-party services. This role is ideal for freelancers, students, or professionals looking for additional work while maintaining a flexible schedule.