Error solution using $ smarty-> register_object

Use $ smarty-& gt; register_object to report my php & lt ;? Phprequire (& quot; libs/Smarty. class. php & quot;); $ smarty = newSmarty; $ smarty-& gt; template_d use $ smarty-> register_object to report an error
My php


Require ("libs/Smarty. class. php ");

$ Smarty = new Smarty;

$ Smarty-> template_dir = "templates ";
$ Smarty-> cache_dir = "cache ";
$ Smarty-> config_dir = "configs ";
$ Smarty-> compile_dir = "templates_c ";

Class My_Object
{
Function meth1 ($ params, & $ smarty_obj)
{
Return "this is my meth1 ";
}
}

$ Myobj = new My_Object;
// Registering the object (will be by reference)
$ Smarty-> register_object ("foobar", $ myobj );

$ Smarty-> display ('EG _ 15_1.tpl ');

?>

The following error is reported:
Fatal error: Uncaught exception 'smartyexception' with message 'Call of unknown method 'register _ object '. 'In D: \ xampp \ htdocs \ smarty \ libs \ sysplugins \ smarty_internal_templatebase.php: 806 Stack trace: #0 D: \ xampp \ htdocs \ smarty \ eg_15_1.php (22 ): smarty_Internal_TemplateBase->__ call ('register _ object', Array) #1 D: \ xampp \ htdocs \ smarty \ eg_15_1.php (22): Smarty-> register_object ('foobar ', object (My_Object) #2 {main} thrown in D: \ xampp \ htdocs \ smarty \ libs \ sysplugins \ smarty_internal_templatebase.php on line 806

Please help me with it...


------ Solution --------------------
Register_object ==> assign