<?php 

Class Cep {
	private $cep;
	

	public function setCep($cep){
		$this->cep = $this->validate($cep);
	}

	public function getCep(){
		return $this->cep;
	}

	public function validate($cep){
		$valorCep = preg_replace("/\D/", "", $cep);

		$intervalosCep =  [['09000001', '09399999'], ['09600001', '09899999'], ['09500001', '09599999']];

		foreach($intervalosCep as $cep){
			list($min, $max) = $cep;
			if($valorCep >= $min && $valorCep < $max) {
				return $this->cep = true;
			}else {
				return  $this->cep = false;
			}
		}
	}
}


$teste = new Cep();

$teste->setCep('091111121');

echo $teste->getCep();