<?php
// PHP Get Integer Size (wouldn't expect 32-bit OS to deal with 64-bit Int's)
var_dump(PHP_INT_SIZE);
// setup
$dt = DateTime::createFromFormat("U", PHP_INT_MAX);
// should return 64-bit max
var_dump(sprintf("%064b", $dt->format('U')));
// should return 64-bit max
var_dump(sprintf("%064b", $dt->getTimestamp()));
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
int(8)
string(64) "0111111111111111111111111111111111111111111111111111111111111111"
string(64) "0111111111111111111111111111111111111111111111111111111111111111"