CentOS 7 PECL with oci8-2
After documented installation stucks
$ yum install systemtap-sdt-devel
$ export ORACLE_HOME=/usr/include/oracle/XX.X/client64
$ LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib; export $ LD_LIBRARY_PATH
$ export PHP_DTRACE=yes
$ C_INCLUDE_PATH=/usr/include/oracle/XX.X/client64 pecl install oci8
[autodetect]
$ echo extension=oci8.so > /etc/php.d/instantclient.ini
$ systemctl reload https