php 配列に値を挿入する

<?php

$arr = ["aaa", "bbb", "ccc"];

array_push($arr, "ddd");

$arr[] = "eee";

print_r($arr);

Array
(
    [0] => aaa
    [1] => bbb
    [2] => ccc
    [3] => ddd
    [4] => eee
)

<?php

$arr = array();

array_push($arr, 10);
array_push($arr, 20);
array_push($arr, 30);

while ($v = array_pop($arr)) {
    print "$v\n";
}

// 30
// 20
// 10