[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/value/Makefile

@@ -0,0 +1,20 @@
+TOP        = ../..
+SWIGEXE    = $(TOP)/../swig
+SWIG_LIB_DIR = $(TOP)/../$(TOP_BUILDDIR_TO_TOP_SRCDIR)Lib
+SRCS       = example.c
+TARGET     = example
+INTERFACE  = example.i
+LIBS       =
+SWIGOPT    = -noproxy
+
+check: build
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' php_run
+
+build:
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' SRCS='$(SRCS)' \
+	SWIG_LIB_DIR='$(SWIG_LIB_DIR)' SWIGEXE='$(SWIGEXE)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' \
+	php
+
+clean:
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' php_clean

Examples/php5/value/example.c

@@ -0,0 +1,13 @@
+/* File : example.c */
+
+#include "example.h"
+
+double dot_product(Vector a, Vector b) {
+  return (a.x*b.x + a.y*b.y + a.z*b.z);
+}
+
+void vector_add(Vector a, Vector b, Vector* result) {
+  result->x = a.x + b.x;
+  result->y = a.y + b.y;
+  result->z = a.z + b.z;
+}

Examples/php5/value/example.h

@@ -0,0 +1,8 @@
+/* File : example.h */
+
+typedef struct {
+     double x, y, z;
+} Vector;
+
+double dot_product(Vector a, Vector b);
+void vector_add(Vector a, Vector b, Vector* result);

Examples/php5/value/example.i

@@ -0,0 +1,17 @@
+// Tests SWIG's handling of pass-by-value for complex datatypes
+%module example
+
+%{
+#include "example.h"
+%}
+
+%include "example.h"
+
+/* Some helper functions for our interface */
+%inline %{
+
+void vector_print(Vector *v) {
+  printf("Vector %p = (%g, %g, %g)\n", (void *)v, v->x, v->y, v->z);
+}
+%}
+

Examples/php5/value/runme.php

@@ -0,0 +1,43 @@
+<?php
+
+	require "example.php";
+
+
+	$v = new_vector();
+        vector_x_set($v,1.0);
+        vector_y_set($v,2.0);
+        vector_z_set($v,3.0);
+
+	$w = new_vector();
+        vector_x_set($w,10.0);
+        vector_y_set($w,11.0);
+        vector_z_set($w,12.0);
+
+	echo "I just created the following vector\n";
+	vector_print($v);
+	vector_print($w);
+
+	echo "\nNow I'm going to compute the dot product\n";
+
+	$d = dot_product($v, $w);
+
+	echo "dot product = $d (should be 68)\n";
+
+	echo "\nNow I'm going to add the vectors together\n";
+
+        $r = new_vector();
+	vector_add($v, $w, $r);
+
+	vector_print($r);
+
+	echo "The value should be (11,13,15)\n";
+
+	echo "\nNow I'm going to clean up the return result\n";
+
+#	free($r);
+
+	echo "Good\n";
+
+?>
+
+