PHP error WARNING: SESSION_START() [FUNCTION.SESSION-START] solution_PHP tutorial

When doing development, you sometimes encounter this problem when operating sessions: Warning: session_start() [function.session-start]......

PHP environment:
OS: CentOS release 5.2 (Final)
Apache:
Server version: Apache/2.2.3
Server built: Jan 15 2008 20: 33:30
php:
PHP 5.1.6 (cli) (built: May 24 2008 14:07:53)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2. 1.0, Copyright (c) 1998-2006 Zend Technologies

The error message is as follows:

Solution:
Method 1. Comment out
session.save_path = “/var/lib/php/session” in /etc/php.ini
Method 2, View the apache user and group, and then add the user to the group where the session folder is located.
Method 3, don’t have any output before session_start()!
Then restart Apache;
OK, the problem is solved!