- assert: documentation ( source)
- var_dump: documentation ( source)
- pack: documentation ( source)
- unpack: documentation ( source)
<?php
$original = "9223372036854775807";
$packed = pack("P", $original);
assert(strlen($packed) === 8);
$unpacked = unpack("P", $packed);
echo $original . "\n";
var_dump($unpacked);