Payment gateway integration - How to integrate

HI,

 

I am a beginner in learning to code and started to learn using wordpress CMS and couple of php tutorials. Learning most of the stuff by debugging and examples.

 

I am interested in understanding and learning making api calls and handling responses from the api calls in codeigniter framework, laravel and wordpress woocommerce plugin formats.

I have picked up marketplace payment gateway api of instamojo and cashfree to start with.

I could make api calls with response ok with absoute values but finding it difficult to use dynamic values from input registration fields or other form fields and also storing the generated response in to the database.

 

Can anyone guide and help me understand the process to complete my learning project on payment gateway integrations using php curl.

 

Thanks in advance

 

Ravi