- var_dump: documentation ( source)
- json_encode: documentation ( source)
- number_format: documentation ( source)
<?php
var_dump(json_encode([0.00000000120023021301]));
$a = (string) 0.00000000120023021301;
var_dump($a);
$b = 0.00000000120023021301;
var_dump(number_format($b, 24));