I have a interesting question for anyone that can answer it.

I want to create function that verifies that a requested component exists. For example:

function isComponent($componentName)
{
// Code to verify component exists
}

My question being is there a way to do this or would have just have to do it with a switch. Any help is appreciated.

Xistins

More information is needed in order to answer this question.
What exactly do you mean by component?

If it's a class like any other then class_exists might be what you are looking for.

Okay to clarify...

If say using the above example:

isComponent('form') <--- should return true as there is a Zend_Form
isComponent('shazbot') <--- would return false because there isn't one.

I'm currently doing this with a switch for the different components but I guess I was hoping there was a "prettier" way to do it as this way is rather ugly and a lot of code.

As for a little bit more of information I need the ability to also instantiate the component as well. I.E.

if(isComponent($requested))
{
$this->services[$requested] = new Zend_$requested;
}

I may have to keep doing this with a switch and that is okay, but I was hoping there was an easier way to do it.

Any help is appreciated.

X

Still sounds to me like you should take a look at the php built-in function class_exists.

function isComponent($componentName)
{
// Code to verify component exists
$filename = '/zend/$componentName'; // suppose your ZendFramwork library dir is /zend/
if (file_exists($filename)) {
return true;
} else {
return false;
}
}

I think if this dir "/zend/form" exists, the component exists

I don't want to question what you are trying to do, but I am guessing that it is a waste of time if you are trying to detect if a Zend_Class has been loaded or not. If you are worried about loading a class more than once, just use .

You can just set up the autoloader and not even have to worry about this:


If you are trying to load a class in the library and it isn't even there, then your app should be breaking so that you know you have to fix it.