[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/pointer/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    =
+
+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/pointer/example.c

@@ -0,0 +1,16 @@
+/* File : example.c */
+
+void add(double *x, double *y, double  *result) {
+  *result = *x + *y;
+}
+
+void sub(int *x, int *y, int *result) {
+  *result = *x - *y;
+}
+
+int divide(int n, int d, int *r) {
+   int q;
+   q = n/d;
+   *r = n - q*d;
+   return q;
+}

Examples/php5/pointer/example.i

@@ -0,0 +1,30 @@
+/* File : example.i */
+%module example
+
+%{
+extern void add(double *, double *, double *);
+extern void sub(int *, int *, int *);
+extern int divide(int, int, int *);
+%}
+
+/* This example illustrates a couple of different techniques
+   for manipulating C pointers */
+
+%include phppointers.i
+/* First we'll use the pointer library */
+extern void add(double *REF, double *REF, double *REF);
+
+/* Next we'll use some typemaps */
+
+%include typemaps.i
+extern void sub(int *INPUT, int *INPUT, int *OUTPUT);
+
+/* Next we'll use typemaps and the %apply directive */
+
+//%apply int *OUTPUT { int *r };
+//extern int divide(int n, int d, int *r);
+
+
+
+
+

Examples/php5/pointer/runme.php

@@ -0,0 +1,35 @@
+<?php
+
+	require "example.php";
+
+	# First create some objects using the pointer library.
+
+	print "Testing the pointer library\n";
+
+	$a = 37.145;
+	$b = 42.555;
+	$c = "";  // $c must be defined and not null.
+
+	print "	a = $a\n";
+	print "	b = $b\n";
+	print "	c = $c\n";
+
+	# Call the add() function wuth some pointers
+	add($a,$b,$c);
+
+	print "	$a + $b = $c\n";
+
+	# Now try the typemap library
+	# This should be much easier. Now how it is no longer
+	# necessary to manufacture pointers.
+
+	print "Trying the typemap library\n";
+	$r = sub(37,42);
+	print "	37 - 42 = $r\n";
+
+	# Now try the version with multiple return values
+	# print "Testing multiple return values\n";
+	# ($q,$r) = divide(42,37);
+	# print "	42/37 = $q remainder $r\n";
+
+?>