How to get top 5 higher values in json files inside folder - php

Question

public function onRun(int $currentTick){
foreach (glob($this->plugin->getDataFolder()."/players/*.json") as $plData) {
$str = file_get_contents($plData);
$json = json_decode($str, true);
$levels = $json["level"];
}
}
I want to get top 5 higher values from all json files in "players" folder, I only know how to get that value from all files, but don't know how to select 5 higher. Can someone help please?
EDIT: Json file looks like this:
{
"coins": 0,
"rank": "Guest",
"accept_friends": true,
"reward_time": 1440,
"level": "29",
"bio": "Today is very cool!c",
"progress": 24.939999999999998,
"local_ip": "10.0.0.1",
"registred": true,
"logged": true
}

Answer 1

Use usort!
Make a function that will handle your sorting:
function levelSort($a, $b)
{
return $a['level']>$b['level'];
}
next store your players to array, sort it and return first five elements:
public function onRun(int $currentTick){
$players = []; // declare aray with proper scope
foreach (glob($this->plugin->getDataFolder()."/players/*.json") as $plData) {
$str = file_get_contents($plData);
$json = json_decode($str, true);
$players[] = $json; // save to array
}
usort($players, 'levelSort'); // sort using custom function
return array_slice($players, 0, 5); // return 5 elements
}
Should work. didn't tested tho :D
Of course this example assuming that every $json is an array and $json['level'] exists and is int

Answer 2

You need to build an array of levels with $levels[] as you are overwriting $levels each time. Then just reverse sort and slice the top 5:
public function onRun(int $currentTick){
foreach (glob($this->plugin->getDataFolder()."/players/*.json") as $plData) {
$str = file_get_contents($plData);
$json = json_decode($str, true);
$levels[] = $json["level"];
}
rsort($levels);
return array_slice($levels, 0, 5);
}
If you want to return the entire top 5 arrays:
public function onRun(int $currentTick){
foreach (glob($this->plugin->getDataFolder()."/players/*.json") as $plData) {
$str = file_get_contents($plData);
$results[] = json_decode($str, true);
}
array_multisort(array_column($results, 'level'), SORT_DESC, $results);
return array_slice($results, 0, 5);
}
Why are you passing in an argument $currentTick and not using it? Maybe replace 5 with $currentTick so you can pass it in?