ACC SHELL

<?php
class TF_Validate_Psc extends Zend_Validate_Abstract
{
    const NOT_PSC = 'notPsc';

    /**
     * @var array
     */
    protected $_messageTemplates = array(
        self::NOT_PSC => "'%value%' is not PSČ."
    );

    /**
     * Defined by Zend_Validate_Interface
     *
     * Returns true if and only if $value is a valid integer
     *
     * @param  string $value
     * @return boolean
     */
    public function isValid($value)
    {
    	$phoneNumber = (string)$value;
    	$pattern = '^[0-9]{3}[ ]?[0-9]{2}$';
    	if(eregi($pattern, $value)){
    		return true;
	    } else {
    		$this->_error(self::NOT_PSC, $value);
    		return false;	
    	}
    }
}