Question

Aloha 🙂

Is it possible to have a constructor with a reference as a parameter and then use that from another class?

    Class 1 named ABC
    function __construct( $table, $key, &$db ){

    $this->_tbl     = $table;
    $this->_tbl_key = $key;
    $this->_db      =& $db;
    $this->_pkey = $key;
}

Next I want to use ABC in XYZ. Like so:

    $ABC= new ABC("dummytable", "id");

But obviously this is missing a paramater and when I do enter a paramater it returns an error about reference..

How can I solve this?

Thanks 🙂

Answer 1

If $db is object, then don’t pass it as reference. If the parameter is optional, then give it a default value.

function __construct( $table, $key, $db = null){
    $this->_tbl     = $table;
    $this->_tbl_key = $key;
    $this->_db      = $db;
    $this->_pkey = $key;
}