What programming language is CodeIgniter written in?

You're likely running CodeIgniter 4.6.0 on PHP version older than 7.4—CI 4.6 requires PHP 7.4 or higher due to features like typed properties (e.g., public string $baseURL). Upgrade your PHP to 7.4, 8.0, or 8.1 to avoid syntax errors.

To generate multiple barcodes in CodeIgniter, you can loop through your barcode generation code, providing the required data for each barcode, and generate multiple barcodes accordingly.

You can generate barcodes in CodeIgniter by using Zend library, follow the steps given below to generate:

• Firstly, generate a random number
• Then, load zend library
• By using factory method create instance of renderer
• Fill the necessary details required like barcode format, name, etc
• Press Enter
• Then, store the image in the barcode folder
• Load the image and use it

A web application firewall (WAF) detects and prevent attacks by analysing incoming and outgoing data, identifying known attack patterns, detecting unusual user activity and automatically denying malicious traffic.

Web application firewalls (WAF) keep websites safe by blocking threats, checking incoming traffic, and creating special rules to help protect each website. WAF also helps follow security requirements like PCI-DSS.