PHPで動的にメソッドを追加する方法 ref: http://qiita.com/uchiko/items/1c97a1ae0cd98b1b229d

test1.php

class Object
{
    static private $_methods = array();

    static public function addMethod($name, Closure $cb)
    {
        self::$_methods[$name] = $cb;
    }

    public function __call($name, array $args)
    {
        $func = self::$_methods[$name];
        return call_user_func_array($func->bindTo($this, get_class($this)), $args);
    }

    public function add($a, $b)
    {
        return $a + $b;
    }
}

foreach (array(10,100,1000) as $base) {
    Object::addMethod('add'.$base, function($number) use ($base) {
        return $this->add($number, $base);
    });
}

$object = new Object();

echo $object->add10(1)."\n";
echo $object->add100(1)."\n";
echo $object->add1000(1)."\n";

test2.php

<?php

class Object
{
    static private $_methods = array();

    static public function addMethod($name, Closure $cb)
    {
        self::$_methods[$name] = $cb;
    }

    public function __call($name, array $args)
    {
        array_unshift($args, $this);
        return call_user_func_array(self::$_methods[$name], $args);
    }

    public function add($a, $b)
    {
        return $a + $b;
    }
}

foreach (array(10,100,1000) as $base) {
    Object::addMethod('add'.$base, function($self, $number) use ($base) {
        return $self->add($number, $base);
    });
}

$object = new Object();

echo $object->add10(1)."\n";
echo $object->add100(1)."\n";
echo $object->add1000(1)."\n";