added test and added global to be null

Author: zelgerj

src/appserver.c

@@ -355,6 +355,12 @@ PHP_FUNCTION(appserver_session_init)
 	PS(mod_user_is_open) = 0;
 	/* Do NOT init PS(mod_user_names) here! */
 	PS(http_session_vars) = NULL;
+
+	/* update SESSION global and set it NULL */
+	zval *nullVal;
+	ALLOC_INIT_ZVAL(nullVal);
+	Z_TYPE_P(nullVal) = IS_NULL;
+	zend_hash_update(&EG(symbol_table), "_SESSION", strlen("_SESSION") + 1, &nullVal, sizeof(zval *), NULL);
 }
 
 /* {{{ proto boolean appserver_redefine(string $constant [, mixed $value]) 

src/tests/appserver_013.phpt

@@ -0,0 +1,41 @@
+--TEST--
+appserver: call appserver_session_init and check if session env was reset properly 
+--CREDITS--
+Johann Zelger <jz [at] techdivision [dot] com>
+--INI--
+error_reporting = E_ERROR
+--FILE--
+<?php
+$initSessionStatus = var_export(session_status(), true);
+$initSessionGlobal = var_export($_SESSION, true);
+session_start();
+
+$_SESSION['test-key'] = 'test-value';
+var_dump($_SESSION);
+var_dump(session_status());
+
+session_write_close();
+var_dump($_SESSION);
+var_dump(session_status());
+
+appserver_session_init();
+echo var_export(session_status(), true) . "\r\n";
+echo var_export($_SESSION, true) . "\r\n";
+
+echo $initSessionStatus . "\r\n";
+echo $initSessionGlobal . "\r\n";
+--EXPECT--
+array(1) {
+  ["test-key"]=>
+  string(10) "test-value"
+}
+int(2)
+array(1) {
+  ["test-key"]=>
+  string(10) "test-value"
+}
+int(1)
+1
+NULL
+1
+NULL