<?php 
class App_Form_Validators_EmailPec extends Zend_Validate_Abstract
    {
        const EMAIL_NULL='is_empty';
		const EMAIL_ISPEC='is_pec';
		private $_PEC_DOMAINS = array('pec.it','arubapec.it','legalmail.it');

		 
	    protected $_messageTemplates = array(
	        self::EMAIL_NULL=>'Valore non presente ',
	        self::EMAIL_ISPEC=>"L'Email inserita sembra essere una PEC, si prega di inserire un email privata"
	    );
     
        public function isValid($value)
        {
            $this->_setValue($value);
     
            $isValid = true;
			
			if ($value === ''){
				$this->_error(self::EMAIL_NULL);
                $isValid = false;
			}

            $domain = explode('@',$value);
			$domain = $domain[1];

			if(in_array($domain,$this->_PEC_DOMAINS)){
				$this->_error(self::EMAIL_ISPEC);
				$isValid = false;
			}
     
            return $isValid;
        }
    }