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PHP : Session write problem

(problem php session, session path , session.save_path)

Few days ago i shifted few of my site to new server,  Soon we found that the user cannot login to the site. After searching the problem i found that the temporary directory that save the session file is not writable .
To fine if the current session  is writable or not  :

Below code will return you the current session path -
ini_get("session.save_path");

Below code will return true or false, if the directory is writable the true else false-
is_writable(ini_get("session.save_path"))

if the current session save path is not writable the make it writable if that is not possible the change the path like ini_set("session.save_path","/tmp"); This code should place before session_start();
Or you can change the path in php.ini file the value of session.save_path 

 PHP : Session write problem 

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