What is grep and how would you use it to find all references to the variable total_count?

Question

Please provide some details on the static class variable, how it works and any example would be great.

Answer 1

grep is a tool used to print lines matching a pattern.

For your query just execture these line:

grep -r "total_count"      file_name

It will print all the line inside file_name which contains the pattern "total_count"

For more info regarding grep do a < man grep >