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

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 .....

You have the `error_reporting` values different for both these machines — PHP Bugs, Dec 07 '12 at 08:09
@lbu Yes , I track the session start, and I have tried this too, if(!isset($_SESSION)){ session_start();} . but didnt get right solution — Muthuraj Muthulingam, Dec 07 '12 at 08:10
@PHP Bugs please tell me where can I find error reporting values — Muthuraj Muthulingam, Dec 07 '12 at 08:13
You can see this from your `php.ini` file. Find out where this file is located from the `phpinfo` page. — PHP Bugs, Dec 07 '12 at 08:15

score 45 · Accepted Answer · answered Dec 07 '12 at 10:10

45

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.

answered Dec 07 '12 at 10:10

Peter Kiss

9,309
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Thanks! I used PHP 5.6 for developing ( used session_status() for checking session) but on server only supports to PHP 5.3 so I got it fixed simply by your answer. – Harsha May 03 '15 at 14:18

score 5 · Answer 2 · answered Dec 07 '12 at 08:30

5

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..

answered Dec 07 '12 at 08:30

Sridhar

2,228
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score 5 · Answer 3 · answered Dec 07 '12 at 10:05

This message is an E_NOTICE. The reason you're only seeing it on the Windows machine is most likely because you have error_reporting set differently.

If you search php.ini for error_reporting you should exclude E_NOTICE if you don't want to see it.

Alternatively, fix your code to not start a session more than once. Ideally, you would only have one core code file that would start your session and no other instances of session_start() (ie. don't put it on each page). You can then include this on each page, or create a routing pattern that will ensure initialisation code is called on each pageload.

score 0 · Answer 4 · answered Dec 07 '12 at 08:11

0

Have a look at session.auto_start in your php.ini (http://php.net/session.auto-start), most likely the session is automatically started

answered Dec 07 '12 at 08:11

Rainer.R

458
2
8

I have checked the php.ini file and found auto_start=0 – Muthuraj Muthulingam Dec 07 '12 at 08:15

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

4 Answers4