![php - Could you please recommend an approach on converting non-unique field to a unique field? - Software Engineering Stack Exchange php - Could you please recommend an approach on converting non-unique field to a unique field? - Software Engineering Stack Exchange](https://i.stack.imgur.com/hWSoI.png)
php - Could you please recommend an approach on converting non-unique field to a unique field? - Software Engineering Stack Exchange
![PDF Invoice Using PHP Within A Minute - Free Online Academy Projects On PHP, Codeigniter, Laravel, Python, Django, Download Source Code in Free PDF Invoice Using PHP Within A Minute - Free Online Academy Projects On PHP, Codeigniter, Laravel, Python, Django, Download Source Code in Free](https://freeonlineprojects.com/wp-content/uploads/2021/01/equipment_invoice_tax-php.png)
PDF Invoice Using PHP Within A Minute - Free Online Academy Projects On PHP, Codeigniter, Laravel, Python, Django, Download Source Code in Free
![Establishment Billing Management System using PHP/MySQL with Source Code | Free Source Code Projects and Tutorials Establishment Billing Management System using PHP/MySQL with Source Code | Free Source Code Projects and Tutorials](https://www.sourcecodester.com/sites/default/files/2020-10/images/billing.png)