Check call_user_func_array return data PHP

Question

How to check call_user_func_array return data PHP:

i have class 1:

class MyClass
{
   public function show()
   {
      echo 'This is show function';
   }
}

class 2:

class MyClass2
{
   public function show2()
   {
      return 'This is show2 function';
   }
}

now, i check:

if(isset(call_user_func_array(array(new MyClass,'show'),$params)))
{
   echo 'Has return data';
}
else
{
   call_user_func_array(array(new MyClass,'show'),$params);//run normal function
}

if(isset(call_user_func_array(array(new MyClass2,'show2'),$params)))
{
   echo 'Has return data';
}
else
{
   call_user_func_array(array(new MyClass2,'show2'),$params);//run normal function
}

but not working, somebody can help me?

Answer 1

Warning isset() only works with variables as passing anything else will result in a parse error. For checking if constants are set use the defined() function.

http://www.php.net/manual/en/function.isset.php