Patch to install pdo_oci. Read full description here: https://gist.github.com/krisanalfa/09b765bb95012cd36fbd

config.m4.patch

--- config.m4	2005-09-25 06:23:24.000000000 +0700
+++ config.m4.new	2015-10-02 15:42:52.000000000 +0700
@@ -8,15 +8,15 @@
     PDO_OCI_VERSION=`grep '"ocommon"' $PDO_OCI_DIR/orainst/unix.rgs | sed 's/[ ][ ]*/:/g' | cut -d: -f 6 | cut -c 2-4`
     test -z "$PDO_OCI_VERSION" && PDO_OCI_VERSION=7.3
   elif test -f $PDO_OCI_DIR/lib/libclntsh.$SHLIB_SUFFIX_NAME.10.1; then
-    PDO_OCI_VERSION=10.1    
+    PDO_OCI_VERSION=10.1
   elif test -f $PDO_OCI_DIR/lib/libclntsh.$SHLIB_SUFFIX_NAME.9.0; then
     PDO_OCI_VERSION=9.0
   elif test -f $PDO_OCI_DIR/lib/libclntsh.$SHLIB_SUFFIX_NAME.8.0; then
     PDO_OCI_VERSION=8.1
   elif test -f $PDO_OCI_DIR/lib/libclntsh.$SHLIB_SUFFIX_NAME.1.0; then
     PDO_OCI_VERSION=8.0
-  elif test -f $PDO_OCI_DIR/lib/libclntsh.a; then 
-    if test -f $PDO_OCI_DIR/lib/libcore4.a; then 
+  elif test -f $PDO_OCI_DIR/lib/libclntsh.a; then
+    if test -f $PDO_OCI_DIR/lib/libcore4.a; then
       PDO_OCI_VERSION=8.0
     else
       PDO_OCI_VERSION=8.1
@@ -25,7 +25,7 @@
     AC_MSG_ERROR(Oracle-OCI needed libraries not found under $PDO_OCI_DIR)
   fi
   AC_MSG_RESULT($PDO_OCI_VERSION)
-])                                                                                                                                                                
+])
 
 PHP_ARG_WITH(pdo-oci, Oracle OCI support for PDO,
 [  --with-pdo-oci[=DIR]      PDO: Oracle-OCI support. Default DIR is ORACLE_HOME.
@@ -58,9 +58,9 @@
     if test -f $PDO_OCI_IC_PREFIX/include/oracle/$PDO_OCI_IC_VERS/client/oci.h ; then
       PHP_ADD_INCLUDE($PDO_OCI_IC_PREFIX/include/oracle/$PDO_OCI_IC_VERS/client)
       AC_MSG_RESULT($PDO_OCI_IC_PREFIX/include/oracle/$PDO_OCI_IC_VERS/client)
-    elif test -f $PDO_OCI_IC_PREFIX/lib/oracle/$PDO_OCI_IC_VERS/client/include/oci.h ; then
-      PHP_ADD_INCLUDE($PDO_OCI_IC_PREFIX/lib/oracle/$PDO_OCI_IC_VERS/client/include)
-      AC_MSG_RESULT($PDO_OCI_IC_PREFIX/lib/oracle/$PDO_OCI_IC_VERS/client/include)
+    elif test -f $PDO_OCI_IC_PREFIX/client/include/oci.h ; then
+      PHP_ADD_INCLUDE($PDO_OCI_IC_PREFIX/client/include)
+      AC_MSG_RESULT($PDO_OCI_IC_PREFIX/client/include)
     else
       AC_MSG_ERROR([I'm too dumb to figure out where the include dir is in your instant client install])
     fi
@@ -112,13 +112,16 @@
     9.0)
       PHP_ADD_LIBRARY(clntsh, 1, PDO_OCI_SHARED_LIBADD)
       ;;
-      
+
     10.1)
       PHP_ADD_LIBRARY(clntsh, 1, PDO_OCI_SHARED_LIBADD)
       ;;
     10.2)
       PHP_ADD_LIBRARY(clntsh, 1, PDO_OCI_SHARED_LIBADD)
       ;;
+    11.2)
+      PHP_ADD_LIBRARY(clntsh, 1, PDO_OCI_SHARED_LIBADD)
+      ;;
     *)
       AC_MSG_ERROR(Unsupported Oracle version! $PDO_OCI_VERSION)
       ;;
@@ -141,7 +144,7 @@
   ])
 
   dnl
-  dnl Check if we need to add -locijdbc8 
+  dnl Check if we need to add -locijdbc8
   dnl
   PHP_CHECK_LIBRARY(clntsh, OCILobIsTemporary,
   [
@@ -203,7 +206,7 @@
   [
     PHP_ADD_EXTENSION_DEP(pdo_oci, pdo)
   ])
-  
+
 fi
 
 fi