php replace \xEF\xBB\xBF code example

Example: php remove bom

function removeBomUtf8($s){
  if(substr($s,0,3)==chr(hexdec('EF')).chr(hexdec('BB')).chr(hexdec('BF'))){
       return substr($s,3);
   }else{
       return $s;
   }
}