add PHP version detection to this branch too, since I'm using this branch to make PECL releases

ext/oci8/config.m4

@@ -101,6 +101,35 @@ PHP_ARG_WITH(oci8, for Oracle (OCI8) support,
                           Use --with-oci8=instantclient,/path/to/oic/lib
                           to use Oracle Instant Client installation])
 
+  AC_MSG_CHECKING([checking PHP version])
+
+  tmp_version=$PHP_VERSION
+  if test -z "$tmp_version"; then
+    if test -z "$PHP_CONFIG"; then
+      AC_MSG_ERROR([php-config not found])
+    fi
+    php_version=`$PHP_CONFIG --version 2>/dev/null|head -n 1|sed -e 's#\([0-9]\.[0-9]*\.[0-9]*\)\(.*\)#\1#'`
+  else
+    php_version=`echo "$tmp_version"|sed -e 's#\([0-9]\.[0-9]*\.[0-9]*\)\(.*\)#\1#'`
+  fi
+
+  if test -z "$php_version"; then
+    AC_MSG_ERROR([failed to detect PHP version, please report])
+  fi
+
+  ac_IFS=$IFS
+  IFS="."
+  set $php_version
+  IFS=$ac_IFS
+  oci8_php_version=`expr [$]1 \* 1000000 + [$]2 \* 1000 + [$]3`
+
+  if test "$oci8_php_version" -le "4003010"; then
+    AC_MSG_ERROR([You need at least PHP 4.3.10 to be able to use this version of OCI8. PHP $php_version found])
+  else
+    AC_MSG_RESULT([$php_version, ok])
+  fi
+
+
 PHP_OCI8_INSTANT_CLIENT="no"
 
 if test "`echo $PHP_OCI8 | cut -d, -f2`" = "instantclient"; then