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diff --git a/examples/SimpleVC.php b/examples/SimpleVC.php
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+#! /usr/bin/php
+##! \file SimpleVC.php
+### \verbatim
+### Original author: mdeters
+### Major contributors: none
+### Minor contributors (to current version): none
+### This file is part of the CVC4 prototype.
+### Copyright (c) 2009, 2010, 2011  The Analysis of Computer Systems Group (ACSys)
+### Courant Institute of Mathematical Sciences
+### New York University
+### See the file COPYING in the top-level source directory for licensing
+### information.\endverbatim
+###
+### \brief A simple demonstration of the PHP interface
+###
+### A simple demonstration of the PHP interface.  Compare to the
+### C++ interface in simple_vc_cxx.cpp; they are quite similar.
+###
+### To run, use something like:
+###
+###   ln -s ../builds/src/bindings/php/.libs/CVC4.so CVC4.so
+###   ln -s ../builds/src/bindings/php/CVC4.php CVC4.php
+###   ./SimpleVC.php
+####
+
+use strict;
+use CVC4;
+
+my $em = new CVC4::ExprManager();
+my $smt = new CVC4::SmtEngine($em);
+
+# Prove that for integers x and y:
+#   x > 0 AND y > 0  =>  2x + y >= 3
+
+my $integer = $em->integerType();
+
+my $x = $em->mkVar("x", $integer);
+my $y = $em->mkVar("y", $integer);
+my $zero = $em->mkConst(new CVC4::Integer(0));
+
+my $x_positive = $em->mkExpr($CVC4::GT, $x, $zero);
+my $y_positive = $em->mkExpr($CVC4::GT, $y, $zero);
+
+my $two = $em->mkConst(new CVC4::Integer(2));
+my $twox = $em->mkExpr($CVC4::MULT, $two, $x);
+my $twox_plus_y = $em->mkExpr($CVC4::PLUS, $twox, $y);
+
+my $three = $em->mkConst(new CVC4::Integer(3));
+my $twox_plus_y_geq_3 = $em->mkExpr($CVC4::GEQ, $twox_plus_y, $three);
+
+my $formula = new CVC4::BoolExpr($em->mkExpr($CVC4::AND, $x_positive, $y_positive))->impExpr(new CVC4::BoolExpr($twox_plus_y_geq_3));
+
+print "Checking validity of formula " . $formula->toString() . " with CVC4.\n";
+print "CVC4 should report VALID.\n";
+print "Result from CVC4 is: " . $smt->query($formula)->toString() . "\n";
+