How to pass php variable into a class function? - php

Question

I want to pass php variable $aa into a class function. I have read some articles
in php.net, but I still don't understand well. Can anyone help me put the variable into this class? thanks.
$aa='some word';
class Action {
private $_objXML;
private $_arrMessages = array();
public function __construct() {
$this->_objXML = simplexml_load_file($aa.'.xml');
}
}

Answer 1

Simply put the variable names in the constructor.
Take a look at the snippet below:
public function __construct( $aa )
{
// some content here
}

Answer 2

I'm not sure what you mean... do you mean you want to access $aa in a function? If so:
$aa='some word';
class Action {
private $_objXML;
private $_arrMessages = array();
public function __construct() {
global $aa;
$this->_objXML = simplexml_load_file($aa.'.xml');
}
}
Or, on a per instance basis, you can do things like:
$aa='some word';
class Action {
private $_objXML;
private $_arrMessages = array();
public function __construct($aa) {
$this->_objXML = simplexml_load_file($aa.'.xml');
}
}
new Action($aa);

Answer 3

$aa='some word';
class Action {
private $_objXML;
private $_arrMessages = array();
public function __construct($aa) {
$this->_objXML = simplexml_load_file($aa.'.xml');
}
}
And use it like this:
$instance = new Action('something');

Answer 4

I don't know php, but my logic and google say this:
class Action {
private $_objXML;
private $_arrMessages = array();
public function __construct($aa) {
$this->_objXML = simplexml_load_file($aa.'.xml');
}
}
$object = new Action('some word');
This is simply called pass a variable as parameter of a function, in this case the function is the constructor of Action