How to solve PHP error WARNING: SESSION_START() [FUNCTION.SESSION-START]

This article mainly introduces the solution to the PHP error WARNING: SESSION_START() [FUNCTION.SESSION-START]. Friends who need it can refer to it.

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

System environment: WIN2003 IIS6 PHP5.2.12

An error similar to the following appears in PHP:
Warning: session_start()[function.session-start]: ...... failed: No such file or directory...... etc.,
You can try modifying the php.ini file Change session.auto_start = 0 to session.auto_start = 1
If the problem still exists after restarting IIS,
That is, the session variable requires the system's temporary file space and requires read and write permissions.
Find session.save_path = in php.ini, set a valid folder path,
For example: session.save_path = "c:\php5\session_temp" and add the permissions of the folder so that everyone can Just modify the write permissions.

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:

Warning:session_start()[function.session-start]:open(/var/lib/php/session/sess_itqfqua1554rmkgcb8u89ujem5,O_RDWR)failed:Permission denied(13)in www_path on line 9
Warning:Unknown:open(/var/lib/php/session/sess_itqfqua1554rmkgcb8u89ujem5,O_RDWR)failed:Permission denied(13)in Unknown on line 0
Warning:Unknown:Failed to write session data (files);Please verify that the current setting of session.sav_path is correct (/var/lib/php/session)in Unknown on line 0

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

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