Mt_rand returns 0

mt_rand(~PHP_INT_MAX, PHP_INT_MAX);

Run a couple of times gives me the following output:

php > echo mt_rand(~PHP_INT_MAX, PHP_INT_MAX) . PHP_EOL;
0
php > echo mt_rand(~PHP_INT_MAX, PHP_INT_MAX) . PHP_EOL;
0
php > echo mt_rand(~PHP_INT_MAX, PHP_INT_MAX) . PHP_EOL;
-3445259641993297920
php > echo mt_rand(~PHP_INT_MAX, PHP_INT_MAX) . PHP_EOL;
0
php > echo mt_rand(~PHP_INT_MAX, PHP_INT_MAX) . PHP_EOL;
0
php > echo mt_rand(~PHP_INT_MAX, PHP_INT_MAX) . PHP_EOL;
0

It does not seem very random. Could anyone explain why it so often returns 0? I was expecting a "random" number between the lowest and highst available

Even more, if you change it abit like

echo mt_rand(-PHP_INT_MAX, PHP_INT_MAX)

It will start returning 1 instead of 0