[PHP] Re: class problem :(
Luke wrote:
Right I've read the manual on this and all that so hopefully you find people
can help.
I have an abstract class with three children. The abstract is ForumObject
and the three children are Thread, Category and Post and each have their own
table so I wrote the following:
abstract class ForumObject
{
static private $table;
static function getObjectIds ($field, $value)
{
$query = SELECT id FROM {self::$table} WHERE $field = '$value';
$object_ids = mysql_fetch_array();
return $object_ids;
}
}
class Category extends ForumObject
{
static private $table = categories;
}
That's just got the important bits for the sake of your eyes but basically
the problem I'm having is calling
Category::getObjectIds ($whatever, $whatever2);
Seems to think that it's referring to ForumObject::$table rather than
Category::$table?
I looked into it and there seems to be something you can do with
get_called_class() but unfortunately I'm stuck with 5.2.9 at the moment and
that is new to 5.3.
Any ideas? Perhaps there is a different way I could implement the classes -
I would rather not have getObjectIds repeated three times!
Thanks in advance,
I didn't test this, just a thought. You'd still have to implement
getObjectIds(), but it would be slim:
abstract class ForumObject
{
static private $table;
static function getObjectIds ($field, $value, $class)
{
$query = SELECT id FROM {$class::$table} WHERE $field = '$value';
$object_ids = mysql_fetch_array();
return $object_ids;
}
}
class Category extends ForumObject
{
static private $table = 'categories';
static function getObjectIds ($field, $value)
{
parent::getObjectIds ($field, $value, __CLASS__)
}
}
Or probably the same because you're defining $table anyway in the child
class:
abstract class ForumObject
{
static private $table;
static function getObjectIds ($field, $value, $table)
{
$query = SELECT id FROM $table WHERE $field = '$value';
$object_ids = mysql_fetch_array();
return $object_ids;
}
}
class Category extends ForumObject
{
static private $table = 'categories';
static function getObjectIds ($field, $value)
{
parent::getObjectIds($field, $value, self::$table)
}
}
--
Thanks!
-Shawn
http://www.spidean.com
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Re: [PHP] Re: class problem :(
2009/5/29 Shawn McKenzie nos...@mckenzies.net
Luke wrote:
Right I've read the manual on this and all that so hopefully you find
people
can help.
I have an abstract class with three children. The abstract is ForumObject
and the three children are Thread, Category and Post and each have their
own
table so I wrote the following:
abstract class ForumObject
{
static private $table;
static function getObjectIds ($field, $value)
{
$query = SELECT id FROM {self::$table} WHERE $field = '$value';
$object_ids = mysql_fetch_array();
return $object_ids;
}
}
class Category extends ForumObject
{
static private $table = categories;
}
That's just got the important bits for the sake of your eyes but
basically
the problem I'm having is calling
Category::getObjectIds ($whatever, $whatever2);
Seems to think that it's referring to ForumObject::$table rather than
Category::$table?
I looked into it and there seems to be something you can do with
get_called_class() but unfortunately I'm stuck with 5.2.9 at the moment
and
that is new to 5.3.
Any ideas? Perhaps there is a different way I could implement the classes
-
I would rather not have getObjectIds repeated three times!
Thanks in advance,
I didn't test this, just a thought. You'd still have to implement
getObjectIds(), but it would be slim:
abstract class ForumObject
{
static private $table;
static function getObjectIds ($field, $value, $class)
{
$query = SELECT id FROM {$class::$table} WHERE $field = '$value';
$object_ids = mysql_fetch_array();
return $object_ids;
}
}
class Category extends ForumObject
{
static private $table = 'categories';
static function getObjectIds ($field, $value)
{
parent::getObjectIds ($field, $value, __CLASS__)
}
}
Or probably the same because you're defining $table anyway in the child
class:
abstract class ForumObject
{
static private $table;
static function getObjectIds ($field, $value, $table)
{
$query = SELECT id FROM $table WHERE $field = '$value';
$object_ids = mysql_fetch_array();
return $object_ids;
}
}
class Category extends ForumObject
{
static private $table = 'categories';
static function getObjectIds ($field, $value)
{
parent::getObjectIds($field, $value, self::$table)
}
}
--
Thanks!
-Shawn
http://www.spidean.com
--
PHP General Mailing List (http://www.php.net/)
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Ah that looks like the perfect solution! Trying now!
Many thanks!
--
Luke Slater
http://dinosaur-os.com/
:O)
[PHP] Re: class Problem
Hi,
when you want to access class member variables prefix them with $this- ,
otherwise they will be treated as local vars.
hope that helps.
Elias
David Eggler [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
I create a Instance fo the Class MenueItem in Menue. I change the value of
one of its variables. But when i call the function within MenueItem there
seems not to be a value:
The intresting thing is it works with Other variables, even i cant echo
them, they have a value
Thanks for help
class Menue {
function Makechilde($somvalue) {
echo Next_ID: . $Parent_ID . BR; //Works
$MI-Parent_ID = $Parent_ID;
echo Parent_ID: . $MI-Parent_ID . BR;//correct output
$MI-write();
}
}
class MenueItem {
var $ID_Menue;
var $Name;
var $Parent_ID;
var $Next_ID;
var $Prev_ID;
function Write() {
echo Parent_ID: . $MI-Parent_ID . BR;
//(no output at all!)
}
}
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