[PHP] Add support for PHP7.

PHP5's C extension API has changed substantially so you need to use
-php7 to specify you want PHP7 compatible wrappers.
Fixes https://github.com/swig/swig/issues/571

Examples/php5/class/Makefile

@@ -0,0 +1,20 @@
+TOP        = ../..
+SWIGEXE    = $(TOP)/../swig
+SWIG_LIB_DIR = $(TOP)/../$(TOP_BUILDDIR_TO_TOP_SRCDIR)Lib
+CXXSRCS    = example.cxx
+TARGET     = example
+INTERFACE  = example.i
+LIBS       =
+SWIGOPT    =
+
+check: build
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' php5_run
+
+build:
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' CXXSRCS='$(CXXSRCS)' \
+	SWIG_LIB_DIR='$(SWIG_LIB_DIR)' SWIGEXE='$(SWIGEXE)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' \
+	php5_cpp
+
+clean:
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' php5_clean

Examples/php5/class/example.cxx

@@ -0,0 +1,28 @@
+/* File : example.cxx */
+
+#include "example.h"
+#define M_PI 3.14159265358979323846
+
+/* Move the shape to a new location */
+void Shape::move(double dx, double dy) {
+  x += dx;
+  y += dy;
+}
+
+int Shape::nshapes = 0;
+
+double Circle::area() {
+  return M_PI*radius*radius;
+}
+
+double Circle::perimeter() {
+  return 2*M_PI*radius;
+}
+
+double Square::area() {
+  return width*width;
+}
+
+double Square::perimeter() {
+  return 4*width;
+}

Examples/php5/class/example.h

@@ -0,0 +1,34 @@
+/* File : example.h */
+
+class Shape {
+public:
+  Shape() {
+    nshapes++;
+  }
+  virtual ~Shape() {
+    nshapes--;
+  }
+  double  x, y;
+  void    move(double dx, double dy);
+  virtual double area() = 0;
+  virtual double perimeter() = 0;
+  static  int nshapes;
+};
+
+class Circle : public Shape {
+private:
+  double radius;
+public:
+  Circle(double r) : radius(r) { }
+  virtual double area();
+  virtual double perimeter();
+};
+
+class Square : public Shape {
+private:
+  double width;
+public:
+  Square(double w) : width(w) { }
+  virtual double area();
+  virtual double perimeter();
+};

Examples/php5/class/example.i

@@ -0,0 +1,9 @@
+/* File : example.i */
+%module example
+
+%{
+#include "example.h"
+%}
+
+/* Let's just grab the original header file here */
+%include "example.h"

Examples/php5/class/runme.php

@@ -0,0 +1,60 @@
+<?php
+
+# This example illustrates how member variables are wrapped.
+
+require("example.php");
+
+# ----- Object creation -----
+
+print "Creating some objects:\n";
+$c = new Circle(10);
+print "    Created circle\n";
+$s = new Square(10);
+print "    Created square\n";
+
+# ----- Access a static member -----
+
+print "\nA total of " . Shape::nshapes() . " shapes were created\n";
+
+# ----- Member data access -----
+
+# Set the location of the object.
+# Note: methods in the base class Shape are used since
+# x and y are defined there.
+
+$c->x = 20;
+$c->y = 30;
+$s->x = -10;
+$s->y = 5;
+
+print "\nHere is their current position:\n";
+print "    Circle = ({$c->x},{$c->y})\n";
+print "    Square = ({$s->x},{$s->y})\n";
+
+# ----- Call some methods -----
+
+# Notice how the Shape_area() and Shape_perimeter() functions really
+# invoke the appropriate virtual method on each object.
+print "\nHere are some properties of the shapes:\n";
+foreach (array($c,$s) as $o) {
+      print "    ". get_class($o) . "\n";
+      print "        area      = {$o->area()}\n";
+      print "        perimeter = {$o->perimeter()}\n";
+}
+
+# ----- Delete everything -----
+
+print "\nGuess I'll clean up now\n";
+
+# Note: this invokes the virtual destructor
+$c = NULL;
+$s = NULL;
+
+# and don't forget the $o from the for loop above.  It still refers to
+# the square.
+$o = NULL;
+
+print Shape::nshapes() . " shapes remain\n";
+print "Goodbye\n";
+
+?>