PHP: A session had already been started - ignoring session_start() comes only in windows [duplicate]

Question

Possible Duplicate:
PHP sessions that have already been started

I have run a my PHP project on windows and also Mac with same code . But I got this error when I run my project in windows not in Mac.

error message is .

A session had already been started - ignoring session_start()

which is come only on Windows system. But In Mac I didnt get any error message. Please any one give me a solution .....

Answer 1

You said that you starts session with a check:

if(!isset($_SESSION)){
    session_start();
}

The fact is the $_SESSION always exists and if you aren't put something in it then it will be always empty, so the statment will return always true.

Answer 2

I didnt know why windows shows the error and Mac dont. But You can try to replace all the session_start() by

if(!isset($_SESSION)) 
    { 
        session_start(); 
    } 

This will may help you..