01.
<?php
02.
class
config_db
03.
{
04.
public
$server
=
'TEST'
;
05.
public
function
__construct(){
06.
07.
}
08.
}
09.
10.
class
test
extends
config_db
11.
{
12.
public
$a
;
13.
public
function
__construct(){
14.
parent::__construct();
15.
$this
->a =
$this
->server;
16.
}
17.
}
18.
$con
=
new
test ();
19.
$res
=
$con
->a ;
20.
echo
$res
;