[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/test-suite/php5/li_factory_runme.php

@@ -0,0 +1,22 @@
+<?php
+
+require "tests.php";
+require "li_factory.php";
+
+// No new functions
+check::functions(array(geometry_draw,geometry_create,geometry_clone_,point_draw,point_width,point_clone_,circle_draw,circle_radius,circle_clone_));
+// No new classes
+check::classes(array(Geometry,Point,Circle));
+// now new vars
+check::globals(array());
+
+$circle = Geometry::create(Geometry::CIRCLE);
+$r = $circle->radius();
+check::equal($r, 1.5, "r failed");
+
+$point = Geometry::create(Geometry::POINT);
+$w = $point->width();
+check::equal($w, 1.0, "w failed");
+
+check::done();
+?>