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

for ( $i = 0; $i <count($arr); $i++) {
    echo $arr[$i]
    if($i > 0){
     echo $arr[$i-1]
   }
}