[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/sync/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)' php_run
+
+build:
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' CXXSRCS='$(CXXSRCS)' \
+	SWIG_LIB_DIR='$(SWIG_LIB_DIR)' SWIGEXE='$(SWIGEXE)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' \
+	php_cpp
+
+clean:
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' php_clean

Examples/php5/sync/example.cxx

@@ -0,0 +1,13 @@
+#include "example.h"
+#include <stdio.h>
+
+int x = 42;
+char *s = (char *)"Test";
+
+void Sync::printer(void) {
+
+	printf("The value of global s is %s\n", s);
+	printf("The value of global x is %d\n", x);
+	printf("The value of class s is %s\n", s);
+	printf("The value of class x is %d\n", x);
+}

Examples/php5/sync/example.h

@@ -0,0 +1,9 @@
+extern char *s;
+extern int x;
+
+class Sync {
+	public:
+		int x;
+		char *s;
+		void printer(void);
+};

Examples/php5/sync/example.i

@@ -0,0 +1,7 @@
+%module example
+
+%{
+#include "example.h"
+%}
+
+%include "example.h"

Examples/php5/sync/runme.php

@@ -0,0 +1,15 @@
+<?
+
+// Load module and PHP classes.
+include("example.php");
+
+echo "Got new object\n";
+echo "Got string $s and value $x \n";
+
+$s = new Sync();
+echo "Got new object\n";
+
+$s->printer();
+
+?>
+