How do I write this method call correctly?

ppowell

${$action . 'Obj'}->"$dbBrandName . $objName"();

This produces a parse error every time, yet I do not know the correct way to write it. I have to write it this way because the variables $action, $dbBrandName and $objName are set by a global library; their values are purely arbitrary, however, the classes and methods will exist by the names generated by $action, $dbBrandName and $objName (could always be checked by method_exists() otherwise).

So, how do I write the above-mentioned code correctly based upon the parameters I gave?

Thanx
Phil

craigh

Originally posted by ppowell
${$action . 'Obj'}->"$dbBrandName . $objName"();

break it up more and see what happens:

$thisobject=${$action . 'Obj'};
$thismethod=$dbBrandName.$objName;
$thisobject->$thismethod();

ppowell

Well apparently trying to break it apart produced nothing I could discern, just more parsing errors.

I wound up doing this instead and it worked:

   $objName = ucfirst($action); // SET TO VARIABLE BECAUSE ONLY A VARIABLE INSTANCE CAN BE USED FOR CLASS OBJECT INSTANTIATION AND !FUNC
   ${$action . 'Obj'} =& new $objName;	// SET UP A DYNAMICALLY-NAMED CLASS OBJECT INSTANCE BASED UPON VALUE OF $objName BASED UPON ACTION
   if (!class_exists($objName) || !method_exists(${$action . 'Obj'}, "$dbBrandName$objName")) {
    $errorArray = $errorArray + array('action' => "Your action '$action' is invalid or your database brand '$dbBrandName' is invalid");
    // NULLIFY ALL VARS TO FORCE TO RETURN TO FRONT PAGE OF UTILITY
    $db = null; $files = null; $table = null; $choice = null; $action = null;
   } else {
    /*-----------------------------------------------------------------------------------------------------------------------------------
	Due to PHP syntax restrictions you can't use the actual class object instance ${$action . 'Obj'} to call its method based upon
	the names $dbBrandName and $objName; instead, you will have to use "call_user_func".  You still must create the object instance
	to check if both class and the class method exist, so you still have to create the class object instance regardless.  Remember
	to nullify the object after you're done
    ------------------------------------------------------------------------------------------------------------------------------------*/
    @call_user_func(array($objName, "$dbBrandName$objName"));
   }

I didn't know about call_uer_func but it seems to come in handy, however, now I have this class object instance just sitting around doing nothing except to verify method_exists to be true or not.

Phil