Removing Object in a Linked List

[oddz]

What would be the best way to actually remove the object from the linked list here rather then hide it?

<?php
class Attribute {

    protected $name;
    protected $value;
    
    protected $attribute;
    
    protected $active = true;
    
    public function __construct($name='',$value='') {
    
        $this->setName($name);
        $this->setValue($value);
    
    }
    
    public function setName($name) {
    
        $this->name = $name;
    
    }
    
    public function setValue($value) {
    
        $this->value = $value;
    
    }
    
    public function getName() {
    
        return $this->name;
    
    }
    
    public function getValue() {
    
        return $this->value;
    
    }
    
    public function addAttribute($name,$value) {
    
        if($this->attribute) {
        
            $this->attribute->addAttribute($name,$value);
        
        } else {
        
            $this->attribute = new Attribute($name,$value);
        
        }
        
        return $this;
    
    }
    
    public function removeAttribute($name) {
    
        if(strcasecmp($this->getName(),$name)==0) {
            $this->active = false;
        }
    
        if($this->attribute) {
        
            $this->attribute->removeAttribute($name);
        
        }
        
        return $this;
    
    }
    
    public function render() {
    
        $str = $this->active?$this->getName().'="'.$this->getValue().'"':'';
        
        if($this->attribute) {
            
            $str.= ' '.$this->attribute->render();
            
        }
        
        return $str;
    
    }

}

$attribute = new Attribute('id','order-form');

echo

$attribute

->addAttribute('class','form')
->addAttribute('method','post')
->addAttribute('action','/index.php')

->removeAttribute('class')
->removeAttribute('action')

->render();