[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/director_protected_runme.php

@@ -0,0 +1,70 @@
+<?php
+
+require "tests.php";
+require "director_protected.php";
+
+check::functions(array(foo_pong,foo_s,foo_q,foo_ping,foo_pang,foo_used,foo_cheer,bar_create,bar_callping,bar_callcheer,bar_cheer,bar_pong,bar_used,bar_ping,bar_pang,a_draw,b_draw));
+check::classes(array(Foo,Bar,PrivateFoo,A,B,AA,BB));
+check::globals(array(bar_a));
+
+class FooBar extends Bar {
+  protected function ping() {
+    return "FooBar::ping();";
+  }
+}
+
+class FooBar2 extends Bar {
+  function ping() {
+    return "FooBar2::ping();";
+  }
+
+  function pang() {
+    return "FooBar2::pang();";
+  }
+}
+
+class FooBar3 extends Bar {
+  function cheer() {
+    return "FooBar3::cheer();";
+  }
+}
+
+$b = new Bar();
+$f = $b->create();
+$fb = new FooBar();
+$fb2 = new FooBar2();
+$fb3 = new FooBar3();
+
+check::equal($fb->used(), "Foo::pang();Bar::pong();Foo::pong();FooBar::ping();", "bad FooBar::used");
+
+check::equal($fb2->used(), "FooBar2::pang();Bar::pong();Foo::pong();FooBar2::ping();", "bad FooBar2::used");
+
+check::equal($b->pong(), "Bar::pong();Foo::pong();Bar::ping();", "bad Bar::pong");
+
+check::equal($f->pong(), "Bar::pong();Foo::pong();Bar::ping();", "bad Foo::pong");
+
+check::equal($fb->pong(), "Bar::pong();Foo::pong();FooBar::ping();", "bad FooBar::pong");
+
+$method = new ReflectionMethod('Bar', 'ping');
+check::equal($method->isProtected(), true, "Foo::ping should be protected");
+
+$method = new ReflectionMethod('Foo', 'ping');
+check::equal($method->isProtected(), true, "Foo::ping should be protected");
+
+$method = new ReflectionMethod('FooBar', 'pang');
+check::equal($method->isProtected(), true, "FooBar::pang should be protected");
+
+$method = new ReflectionMethod('Bar', 'cheer');
+check::equal($method->isProtected(), true, "Bar::cheer should be protected");
+
+$method = new ReflectionMethod('Foo', 'cheer');
+check::equal($method->isProtected(), true, "Foo::cheer should be protected");
+
+check::equal($fb3->cheer(), "FooBar3::cheer();", "bad fb3::pong");
+check::equal($fb2->callping(), "FooBar2::ping();", "bad fb2::callping");
+check::equal($fb2->callcheer(), "FooBar2::pang();Bar::pong();Foo::pong();FooBar2::ping();", "bad fb2::callcheer");
+check::equal($fb3->callping(), "Bar::ping();", "bad fb3::callping");
+check::equal($fb3->callcheer(), "FooBar3::cheer();", "bad fb3::callcheer");
+
+check::done();
+?>