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16 years ago
Trying to recreate an inheritable static part for an object through a singleton pattern.

<?php
/**
 * "Inheritable static" for PHP < 5.3
 * << Library/Inheritable.php >>
 */

abstract class Inheritable_Static extends Singleton
{
}

abstract class Inheritable
{
    public static function getStatic($className)
    {
        // Use an abstract Singleton
        return Singleton::getInstance($className . '_Static') ;
    }
    
    public function goStatic()
    {
        return self::getStatic(get_class($this)) ;
    }
}

/**
 * Abstract
 * << Library/SayIt/Abstract.php >>
 */

abstract class SayIt_Abstract_Static extends Inheritable_Static
{
    public $format ;
}

abstract class SayIt_Abstract extends Inheritable
{
    protected $_name ;
    
    public function __construct($name)
    {
        $this->_name = $name ;
    }
    
    final public function sayIt()
    {
        echo sprintf($this->goStatic()->format, $this->_name) . "\n" ;
    }
    
}

/**
 * Concrete
 * << Library/SayIt/Hello.php >>
 */

class SayIt_Hello_Static extends SayIt_Abstract_Static
{
}

class SayIt_Hello extends SayIt_Abstract
{
    public static function getStatic() { return parent::getStatic(__CLASS__) ; }
}

/**
 * Test
 */

SayIt_Hello::getStatic()->format = 'Hello %s' ;

$w = new SayIt_Hello('World') ;
$j = new SayIt_Hello('Joe') ;

echo $w->sayIt() ; // Hello World
echo $j->sayIt() ; // Hello Joe
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