#2

gistfile1.txt

<?php

// name, damage, durability
$weaponSet1 = [
    ["Sword", 15, 80],
    ["Scythe", 35, 10],
    ["Club", 5, 40],
];

$json = json_encode($weaponSet1);
file_put_contents("output.json", $json);
echo "RANDOM = ".$random = random_int(0,1)."<br>";
if ($random != 0) {
    $ranndomChoise = random_int(0,2);
    $weaponSet2 = [
        ["Immortal King blade", 700, 100],
        ["Nova", 1400, 0],
        ["Death Touch", 5000, 0],
    ];
    array_push($weaponSet1, $weaponSet2[$ranndomChoise]);
    $json = json_encode($weaponSet1);
    file_put_contents("output2.json", $json);

}
if (file_exists("output2.json")) {
    $str1 = file_get_contents("output.json");
    $str2 = file_get_contents("output2.json");
    $arr1 = json_decode($str1);
    $arr2 = json_decode($str2);
    var_dump($arr1);
    echo "<br>";
    echo "<br>";

    var_dump($arr2);
    echo "<br>";
    echo "<br>";
    echo "<br>";
    $df = array_diff($arr1,$arr2);
    print_r($df);

}