get previous array values in foreach

Question

My array :

$arr = array(\"jan\",\"feb\",\"mar\",\"apr\",\"mei\",\"jun\",\"jul\",\"agu\",\"sep\",\"okt\",\"nov\",\"des\");

then i do a foreach<

Answer 1

foreach($arr as $key => $value){
  if ($key > 0) {
   echo $arr[$key-1];
  }
  echo $value;
}

See this question and answer.