ChangePasswordForm.php

<?php
class ChangePasswordForm extends BaseForm
{
  public function configure()
  {  	
  	
  	$this->getWidgetSchema()->setLabel('old', 'Old Password');
  	$this->getWidgetSchema()->setLabel('new', 'New Password');
  	$this->getWidgetSchema()->setLabel('repeat', 'Repeat New Password');
  	
  	$this->mergePostValidator(new sfValidatorCallback(array('callback'  => array($this, 'postValidate'))));
    $this->mergePostValidator(new sfValidatorSchemaCompare('new', sfValidatorSchemaCompare::EQUAL, 'repeat', array(), array('invalid' => 'The two passwords must be the same.')));  	
  }

	
  public function postValidate($validator, $values)
  {
  	if($values['old'] && !$this->getOption('sf_user')->checkPassword($values['old']))
  	{
  		throw new sfValidatorError($validator, 'Old password is incorrect');
  	}

  	return $values;
  }
  
  
  public function setup()
  {
    $this->setWidgets(array(
      'old' => new sfWidgetFormInputPassword(),
      'new' => new sfWidgetFormInputPassword(),
      'repeat' => new sfWidgetFormInputPassword()
    ));

    $this->setValidators(array(    
      'old' => new sfValidatorString(),
      'new' => new sfValidatorString(),
      'repeat' => new sfValidatorString(array('required' => false)), 
    ));
    
    $this->widgetSchema->setNameFormat('password[%s]');
    $this->errorSchema = new sfValidatorErrorSchema($this->validatorSchema);

    parent::setup();
  }
}