Apply this procedure if no PHP installation already exist on your Linux.
For Red-Hat or Centos Linux.
You need gcc installed (as well as all other developpement tools checked during the php configure operation)
1 Download php source from php download site (Choose your php version. V 5.6.40 is the latest version supporting Sybase Ct-Lib)
2 Untar php distribution in a directory
3 Make and install new PHP :
cd your_php_source_installation
./configure --with-sybase-ct=/your_sybase_home/OCS-15_0 --with-apxs2 --with-config-file-path=/etc --with-gd --with-freetype-dir
make
# as root
# stop Apache
service httpd stop
make install
4 Copy php.ini to destination
# as root
cp /your_php_source_installation/php.ini-production /etc/php.ini
5 Restart Apache
# as root
service httpd start