- var_dump: documentation ( source)
<?php
$formatter = new \NumberFormatter('en', \NumberFormatter::DECIMAL);
$value = $formatter->parse('2147483647', \NumberFormatter::TYPE_INT32);
var_dump($value);
$formatter = new \NumberFormatter('en', \NumberFormatter::DECIMAL);
$value = $formatter->parse('2147483650', \NumberFormatter::TYPE_INT64);
var_dump($value);