Promote warnings to exceptions in register_shutdown_handler() function

Author: kocsismate

Zend/tests/bug41026.phpt

@@ -7,7 +7,7 @@ class try_class
 {
 	static public function main ()
 	{
-		register_shutdown_function (array ("self", "on_shutdown"));
+		register_shutdown_function(array ("self", "on_shutdown"));
 	}
 
 	static public function on_shutdown ()
@@ -16,11 +16,13 @@ class try_class
 	}
 }
 
-try_class::main ();
-
+try_class::main();
 echo "Done\n";
 ?>
 --EXPECT--
 Done
 
-Warning: (Registered shutdown functions) Unable to call self::on_shutdown() - function does not exist in Unknown on line 0
+Fatal error: Uncaught ValueError: (Registered shutdown functions) Unable to call self::on_shutdown() - function does not exist in [no active file]:0
+Stack trace:
+#0 {main}
+  thrown in [no active file] on line 0

ext/standard/basic_functions.c

@@ -2840,7 +2840,7 @@ static int user_shutdown_function_call(zval *zv) /* {{{ */
 	if (!zend_is_callable(&shutdown_function_entry->arguments[0], 0, NULL)) {
 		zend_string *function_name
 			= zend_get_callable_name(&shutdown_function_entry->arguments[0]);
-		php_error(E_WARNING, "(Registered shutdown functions) Unable to call %s() - function does not exist", ZSTR_VAL(function_name));
+		zend_value_error("(Registered shutdown functions) Unable to call %s() - function does not exist", ZSTR_VAL(function_name));
 		zend_string_release_ex(function_name, 0);
 		return 0;
 	}