Array Example, Php

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<?php //php 5.5.9

$list = [5,6,7,8,9];

//Get middle number position
    $mid = floor(count($list) / 2);

//Check if array is odd
    $odd = false;
    if(count($list) % 2 !== 0){
        $odd = true;
    }

//Get outer numbers
    $aux = 0; //Starting positions of new array
    $auxTwo = count($list) - 1; //Get the length of the original array

$newList = []; //New list
 if($odd == true){
 //Only take one middle number which is why we subtract 1 in the for cycle so we don't get the middle number
 for($i = 0; $i < count($list) - 1; $i++){
 if($i % 2 == 0){
 //Outer left number
 $newList[$i] = $list[$aux];
 $aux++;
 }else{
 //Outer right number
 $newList[$i] = $list[$auxTwo];
 $auxTwo--;
 }
 
 }
 }else{
 //Take two middle numbers which is why we subtract 2 in the for cycle so we don't get the two middle numbers
 for($i = 0; $i < count($list) - 2; $i++){
 if($i % 2 == 0){
 //Outer left number
 $newList[$i] = $list[$aux];
 $aux++;
 }else{
 //Outer right number
 $newList[$i] = $list[$auxTwo];
 $auxTwo--;
 }
 
 }
 }

//Add middle number(s) into begining
    if($odd == true){
        //Only add one middle number if array is odd
        array_unshift($newList, $list[$mid]);
    }else{
        //Add two middle numbers if array is even
        array_unshift($newList, $list[$mid]);
        array_unshift($newList, $list[$mid - 1]);
    }

//Print old and new array
 if($odd == true){
 echo "Array is odd so only take one middle number. ";
 }else{
 echo "Array is even so take two middle numbers. ";
 }

echo "Old list: ";
 for($i = 0; $i < count($list); $i++){
 echo $list[$i] . ", ";
 }
 echo " New list: ";
 for($i = 0; $i < count($newList); $i++){
 echo $newList[$i] . ", ";
 }
?>

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