How to fix the problem of Warning: session_start(): Cannot send session cache limiter - headers already sent?

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Fix session_start() by using three ways !

On some hosting server there exist the session_start() warning problem that is not controlled by 

error_reporting();
This problem occur due the following reasons:
  1. White spaces in the PHP tag. Programmer should uses good coading practices he/she shouldn't uses white spaces ..
  2. Use the session_start() on the top of the code ..
Some hosting servers like namecheap have problem that these problems are not solved by using above practices, If this problem don't slove by using  above practices ,

Just remove the session_start();  we ensure you that the session variable will successfully passed and there is no problem of session destroying..Its Practical proved..