Updated examples to function correctly with new php4 module. Added

some supplemental examples for cpointer, overloading and references using
proxies.


git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@7391 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/php4/class/example.cxx

@@ -1,7 +1,14 @@
 /* File : example.c */
 
 #include "example.h"
-#define M_PI 3.14159265358979323846
+#include <math.h>
+#ifndef M_PI
+#  define M_PI 3.14159265358979323846
+#endif
+
+int Shape::get_nshapes() {
+  return nshapes;
+}
 
 /* Move the shape to a new location */
 void Shape::move(double dx, double dy) {
@@ -11,6 +18,10 @@ void Shape::move(double dx, double dy) {
 
 int Shape::nshapes = 0;
 
+void Circle::set_radius( double r ) {
+  radius = r;
+}
+
 double Circle::area(void) {
   return M_PI*radius*radius;
 }