PHP get Param, create JSON, create File safety

createJSON.php

<?php
$data = [
    "AAA"=>"XXX",
    "BBB"=>"YYY",
];

function createJSON($data){
  return json_encode($data, JSON_UNESCAPED_UNICODE);
}

$json = createJson($data)

var_dump($json)

getParams.php

<?php
function getParams(){
      $return = array();
      if (isset($_GET) && is_array($_GET)) {
          $return += $_GET;
      }
      if (isset($_POST) && is_array($_POST)) {
          $return += $_POST;
      }
      return $return;
  }

$params = getParams();

var_dump($params)

safeCreateFile.php

<?php
$path = "../data/test.json";

function safeCreatefile($path, $json){
    file_put_contents($path, $json, LOCK_EX);
}

safeCreateFile($path, $json)