php-src/Zend/tests/int_underflow_32bit.phpt

--TEST--
testing integer underflow (32bit)
--SKIPIF--
<?php if (PHP_INT_SIZE != 4) die("skip this test is for 32bit platform only"); ?>
--FILE--
<?php

$doubles = array(
    -2147483648,
    -2147483649,
    -2147483658,
    -2147483748,
    -2147484648,
    );

foreach ($doubles as $d) {
    $l = (int)$d;
    var_dump($l);
}

echo "Done\n";
?>
--EXPECT--
int(-2147483648)
int(2147483647)
int(2147483638)
int(2147483548)
int(2147482648)
Done