- var_dump: documentation ( source)
<?php
$type = gettype(14018919967);
echo $type;
$int = (int)14018919967;
echo PHP_EOL;
echo $int. " != 14018919967";
$type2 = gettype($int);
echo PHP_EOL;
echo $type2;
echo PHP_EOL;
echo PHP_INT_SIZE;
var_dump(DateTime::createFromFormat('U', (double)14018919967));
var_dump(DateTime::createFromFormat('U', (int)14018919967));