This is what I want to do:
class Contacts {
private $_plural = 'contacts';
private $_single = 'contact';
private $_factory = 'contactfactory';
private $_model = 'contact_model';
private $_idname = $_plural . "Id";
function a($$_idname = 0) {
}
}
These two lines:
private $_idname = $_plural . "Id";
and
function a ($$_idname = 0) {
aren't working. Why? And how can I fix this?
EDIT
About the function argument:
If $_idname = "contactId" I want the argument to be $contactId. That's why I have two dollar signs there. This might be not the correct way to handle this, but this is what I want to accomplish.
You could change
private $_idname = $_plural . "Id";
to
private $_idname;
public function __construct(){
$this->_idname = $this->_plural.'Id';
}
first.
Not seeing enough in function a. Probably more like:
public function a($really = 'What is the point of those underscores?'){
${$this->_idname} = $really; // local $contacts var holds $really
}
I'm really guessing that you want to have a method that will automatically change your instantiated Object property. You don't need a variable variable for that. If you want to affect a variable which you are passing as an argument it's &$yourVar. There is no need to pass a property of an instantiated Object to its own method, since you already have access to it within the method with $this->yourVar.
According to PHP's documentation, you must initialize a class attribute with a constant value:
This declaration may include an initialization, but this initialization must be a constant value--that is, it must be able to be evaluated at compile time and must not depend on run-time information in order to be evaluated.
A fix for this would be using a class constructor:
function __construct() {
$this->_idname = $this->_plural . "Id";
}
Also, you can't use dynamic variable names on functions or methods:
Please note that variable variables cannot be used with PHP's Superglobal arrays within functions or class methods. The variable $this is also a special variable that cannot be referenced dynamically.