symfony_password_validator.php

<?php

class fkValidatorPassword extends sfValidatorBase {
	/**
	 * Configures the current validator.
	 *
	 * Available options:
	 *
	 *   password: The password that is already set (required)
	 *   pattern: A regex pattern or an array of regex patterns compatible with PCRE
	 *   password_field: The name of the password field
	 *   password_check_field: The name of the field to conpare the password with
	 *
	 * Available error codes:
	 *   notequal
	 *   invalid
	 *   required
	 *
	 * @param array $options   An array of options
	 * @param array $messages  An array of error messages
	 * @see sfValidatorBase
	 */
	public function configure($options = array(), $messages = array()) {
		$this->addRequiredOption('password', '');
		$this->addOption('pattern',array());
		$this->addOption('password_field', 'password');
		$this->addOption('password_check_field', 'password_check');
		$this->addMessage('notequal', 'Passwords are not euqal.');
	}
	
	protected function doClean($values) {
		$defaultPassword = (string) $this->getOption('password');
		$password = isset($values[$this->getOption('password_field')]) ?
							$values[$this->getOption('password_field')] : '';
		$password_check = isset($values[$this->getOption('password_check_field')]) ?
								$values[$this->getOption('password_check_field')] : '';
		$patterns = is_array($this->getOption('pattern')) ? 
		             $this->getOption('pattern') : array($this->getOption('pattern')); 
		
		// check if a password is set in the form... 
		if(!empty($password)) { 
			if(!empty($patterns)) { 
				foreach($patterns as $pattern) {
					if(!preg_match($pattern, $password)) { 
						throw new sfValidatorErrorSchema($this, 
                                array($this->getOption('password_field') => new sfValidatorError($this, 'invalid'))); 
					} 
				} 
			} 
			// verify password 
			if($password !== $password_check) { 
				throw new sfValidatorErrorSchema($this, 
						array($this->getOption('password_check_field') => new sfValidatorError($this, 'notequal'))); 
			} 
		} 
		else { // no password set in the form, check if a password is already set... 
			if(empty($defaultPassword)) { 
				throw new sfValidatorErrorSchema($this, 
					array($this->getOption('password_field') => new sfValidatorError($this, 'required')));
			} 
			else { 
				unset($values['password']); 
			} 
		} 
		return $values; 
	} 
}