In my /etc/php.ini file I had this line:
extension=pgsql.so
(now removed).
; Note: For Red Hat Linux, packaged extension modules are now loaded via
; the ini files in the directory /etc/php.d.
# ls -l /etc/php.d
-rw-r--r-- 1 root root 51 10 nov 16:40 pgsql.ini
# cat /etc/php.d/pgsql.ini
; Enable pgsql extension module
extension=pgsql.so
Thank you for help!
Now it's ok!!
Mauro