How to deal with get parameter string values

The value of the get parameter string is similar to that of the get parameter in the following format: result = r1 & amp; result1 = r2 & amp; result2 = r3 how to retrieve result & nbsp; result1 & nbsp; result2 value: get parameter string value
The string format similar to the get parameter is as follows:
Result = r1 & result1 = r2 & result2 = r3

How to retrieve the value of result result1 result2 is shared:
------ Solution --------------------
Use parse_str function