: Ensure that any software you use complies with your local laws and licensing agreements.
If you are fixing code for a production environment, ensure you apply these security patches: SQL Injection php point of sale source code fix download
For a reliable, fully-functional PHP POS system, consider these sources: Open Source Point of Sale (OSPOS) : This is a widely used web-based POS application built on CodeIgniter PHP Point of Sale Source Code: A Comprehensive
Searching for "PHP POS" on GitHub allows you to fork repositories that are already being maintained by a community, reducing the number of "fixes" you’ll need to perform manually. Professional Templates: fully-functional PHP POS system