test.php

<?php
var_dump(ini_get('precision'));
var_dump(ini_get('serialize_precision'));

$test = [
        'rank1' => 32.361 * 1000,
        'rank2' => 32.361 * 1,
        'rank3' => 32.361 * 10,
        'rank4' => 32.361 * 100,
        'rank5' => (int)(string)(32.361 * 1000),
];
var_dump($test);
var_dump(json_encode($test));
/*
string(2) "14"
string(2) "-1"
array(5) {
  ["rank1"]=>
  float(32361)
  ["rank2"]=>
  float(32.361)
  ["rank3"]=>
  float(323.61)
  ["rank4"]=>
  float(3236.1)
  ["rank5"]=>
  int(32361)
}
string(99) "{"rank1":32360.999999999996,"rank2":32.361,"rank3":323.60999999999996,"rank4":3236.1,"rank5":32361}"

*/