<?php
$string = "ATENÇÃO: O produto será revisado e constatado o defeito será";
$remover = array ("ATENÇÃO:","será");
PD9waHAKCiRzdHJpbmcgPSAiQVRFTsOHw4NPOiBPIHByb2R1dG8gc2Vyw6EgcmV2aXNhZG8gZSBjb25zdGF0YWRvIG8gZGVmZWl0byBzZXLDoSI7CgokcmVtb3ZlciA9IGFycmF5ICgiQVRFTsOHw4NPOiIsInNlcsOhIik7CgplY2hvICR0ZXh0byA9IHN0cl9yZXBsYWNlKCRyZW1vdmVyLCIiLCRzdHJpbmcpOw==