Restrict allowed usages of $GLOBALS

Author: nikic

Zend/tests/array_self_add_globals.phpt

@@ -2,7 +2,6 @@
 Add $GLOBALS to itself
 --FILE--
 <?php
-$GLOBALS += $GLOBALS;
 $x = $GLOBALS + $GLOBALS;
 ?>
 ===DONE===

Zend/tests/bug71539_6.phpt

@@ -29,6 +29,6 @@ string(%d) "%s"
 Warning: Undefined array key "PHP_SELF" in %s on line %d
 NULL
 
-Warning: Undefined variable $_SERVER in %s on line %d
+Warning: Undefined global variable $_SERVER in %s on line %d
 NULL
 Done

Zend/tests/bug71695.phpt

@@ -32,6 +32,6 @@ string(%d) "%s"
 Warning: Undefined array key "PHP_SELF" in %s on line %d
 NULL
 
-Warning: Undefined variable $_SERVER in %s on line %d
+Warning: Undefined global variable $_SERVER in %s on line %d
 NULL
 Done

Zend/tests/gc_010.phpt

@@ -38,6 +38,6 @@ string(%d) "%s"
 Warning: Undefined array key "PHP_SELF" in %s on line %d
 NULL
 
-Warning: Undefined variable $_SERVER in %s on line %d
+Warning: Undefined global variable $_SERVER in %s on line %d
 NULL
 Done

Zend/tests/globals_001.phpt

@@ -23,6 +23,6 @@ string(%d) "%s"
 Warning: Undefined array key "PHP_SELF" in %s on line %d
 NULL
 
-Warning: Undefined variable $_SERVER in %s on line %d
+Warning: Undefined global variable $_SERVER in %s on line %d
 NULL
 Done

Zend/tests/globals_002.phpt

@@ -0,0 +1,11 @@
+--TEST--
+$GLOBALS no longer contains 'GLOBALS'
+--FILE--
+<?php
+
+$g = $GLOBALS;
+var_dump(isset($g['GLOBALS']));
+
+?>
+--EXPECT--
+bool(false)

Zend/tests/globals_003.phpt

@@ -0,0 +1,10 @@
+--TEST--
+Cannot assign to $GLOBALS
+--FILE--
+<?php
+
+$GLOBALS = [];
+
+?>
+--EXPECTF--
+Fatal error: $GLOBALS can only be modified using the $GLOBALS[$name] = $value syntax in %s on line %d