GH-13142: add missing test cases (#13235)

* Added missing global cases to test

* Update gh13142

Author: jorgsowa

Zend/tests/gh13142.phpt

@@ -10,6 +10,10 @@ $$a;
 $a = "test\0";
 $$a;
 
+$GLOBALS["test\0test"];
+$GLOBALS["\0test"];
+$GLOBALS["test\0"];
+
 compact("a\0b");
 compact("\0ab");
 compact("ab\0");
@@ -22,6 +26,12 @@ Warning: Undefined variable $%0test in %s on line %d
 
 Warning: Undefined variable $test%0 in %s on line %d
 
+Warning: Undefined global variable $test%0test in %s on line %d
+
+Warning: Undefined global variable $%0test in %s on line %d
+
+Warning: Undefined global variable $test%0 in %s on line %d
+
 Warning: compact(): Undefined variable $a%0b in %s on line %d
 
 Warning: compact(): Undefined variable $%0ab in %s on line %d