I have a web application developed using laravel4 (php , MySql) every time I try to login with correct credentials it redirects me back to login again I don't know where is the problem The same project is working properly on another hosting and on localhost
The server support couldn't help me :((
Check date-time settings on your server. Date time should be right. At unix shell: date At php.ini check time zone. date.timezone More info php.net/manual/en/datetime.configuration.php
Are these differences between the two servers are critical or may cause the issue? working server OS >> ubuntu the unworking server OS >> centos and there are some other differences in the version of php and mysql

Mario Giambanco
Director of User Experience Development
Can we see the login code? Otherwise, there really isn't enough information here.
tail -f /var/log/httpd/error-log
Try to login and check the error log for errors
Check and make sure sessions are configured properly in PHP
Check the PHP version between the servers; it might be different enough to cause problems.
Make sure the MySQL DB exists on both servers and is configured with the correct credentials and is running.
Could go on and on. Provide more information and maybe we can help more specifically.