Download latest version of Suhosin, enter:

# cd /opt
# wget http://download.suhosin.org/suhosin-0.9.27.tgz

Make sure you have php-devel installed:

# yum install php-devel
Compile Suhosin under PHP 5 and RHEL / CentOS EL5 Linux

Type the following commands:

# tar -zxvf suhosin-0.9.27.tgz
# cd suhosin-0.9.27
# phpize
#./configure
# make
# make install
Configure Suhosin

Type the following command to create Suhosin configuration file:

# echo ‘extension=suhosin.so’ > /etc/php.d/suhosin.ini
Restart web server

Type the following command to restart httpd:

# service httpd restart

If you are using lighttpd, enter:

# service lighttpd restart
Verify Suhosin installation

Type the following command:

$ php -v

Sample output:

PHP 5.1.6 (cli) (built: Apr 7 2009 08:00:04)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
with Suhosin v0.9.27, Copyright (c) 2007, by SektionEins Gmb

More information can be found at http://www.hardened-php.net/suhosin/