note 86216 added to language.oop5.typehinting
| From: | info at thewebsiteguy dot com dot au | Date: | Wed, 08 Oct 2008 13:30:08 +0000 |
| Subject: | note 86216 added to language.oop5.typehinting | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-145161@lists.php.net to get a copy of this message | ||
I find it rather frustrating that PHP has internal data types but doesn't allow optional
hinting for it. I REALLY needed it for something, so I found a way around it.
<?php
abstract class DataType
{
protected $length;
protected $precision;
protected $number;
public function __construct()
{
$this->number = false;
$this->precision = null;
}
public function GetLength()
{
return $this->length;
}
public function IsNumber()
{
return $this->number;
}
public function GetPrecision()
{
return $this->precision;
}
}
class Integer extends DataType
{
public function __construct($length = 12)
{
parent::__construct();
$this->number = true;
$this->length = $length;
$this->precision = 0;
}
}
class Float extends DataType
{
public function __construct($length = 12, $precision = 2)
{
parent::__construct();
$this->number = true;
$this->length = $length;
$this->precision = $precision;
}
}
class String extends DataType
{
public function __construct($length = 255)
{
parent::__constructor();
$this->length = $length;
}
}
//etc etc through the types...
?>
then later I can do this...
<?php
final class Field
{
public $Name;
public $Mandatory;
public $Hidden;
public $ListField;
public $Value;
public $ForeignClass;
public $ReadOnly;
public $DataType;
public function __construct($name, DataType $dataType, $mandatory = false, $listField = true,
$value = null, $readOnly = false, BaseCBO $foreignClass = null)
{
$this->Name = $name;
$this->DataType = $dataType;
$this->Mandatory = $mandatory;
$this->ListField = $listField;
$this->Value = $value;
$this->ReadOnly = $readOnly;
$this->ForeignClass = $foreignClass;
}
}
// ....
class DoSomeStuff
{
public function DoGenericThings(Field $field)
{
if ($field->DataType instanceof Integer)
{
// do things for an integer field...
}
}
}
?>
I asked myself a few times if this was the right language for my problem, but there are so many good
things about PHP that I made this as a dirty work around.
----
Server IP: 117.104.160.194
Probable Submitter: 203.214.47.162
----
Manual Page -- http://www.php.net/manual/en/language.oop5.typehinting.php
Edit -- https://master.php.net/note/edit/86216
Del: integrated -- https://master.php.net/note/delete/86216/integrated
Del: useless -- https://master.php.net/note/delete/86216/useless
Del: bad code -- https://master.php.net/note/delete/86216/bad+code
Del: spam -- https://master.php.net/note/delete/86216/spam
Del: non-english -- https://master.php.net/note/delete/86216/non-english
Del: in docs -- https://master.php.net/note/delete/86216/in+docs
Del: other reasons-- https://master.php.net/note/delete/86216
Reject -- https://master.php.net/note/reject/86216
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