--- /dev/null
+--TEST--
+Test array_keys() function (variation - 2)
+--SKIPIF--
+<?php
+if (PHP_INT_SIZE != 8) die("skip this test is for 64bit platform only");
+?>
+--FILE--
+<?php
+
+echo "\n*** Testing array_keys() on range of values ***\n";
+$arr_range = array(
+ 2147483647 => 1,
+ 2147483648 => 2,
+ -2147483647 => 3,
+ -2147483648 => 4,
+ -2147483649 => 5,
+ -0 => 6,
+ 0 => 7
+);
+var_dump(array_keys($arr_range));
+
+echo "\n*** Testing array_keys() on an array created on the fly ***\n";
+var_dump(array_keys(array("a" => 1, "b" => 2, "c" => 3)));
+var_dump(array_keys(array())); // null array
+
+echo "Done\n";
+?>
+--EXPECTF--
+*** Testing array_keys() on range of values ***
+array(6) {
+ [0]=>
+ int(2147483647)
+ [1]=>
+ int(2147483648)
+ [2]=>
+ int(-2147483647)
+ [3]=>
+ int(-2147483648)
+ [4]=>
+ int(-2147483649)
+ [5]=>
+ int(0)
+}
+
+*** Testing array_keys() on an array created on the fly ***
+array(3) {
+ [0]=>
+ string(1) "a"
+ [1]=>
+ string(1) "b"
+ [2]=>
+ string(1) "c"
+}
+array(0) {
+}
+Done
+--UEXPECTF--
+*** Testing array_keys() on range of values ***
+array(6) {
+ [0]=>
+ int(2147483647)
+ [1]=>
+ int(2147483648)
+ [2]=>
+ int(-2147483647)
+ [3]=>
+ int(-2147483648)
+ [4]=>
+ int(-2147483649)
+ [5]=>
+ int(0)
+}
+
+*** Testing array_keys() on an array created on the fly ***
+array(3) {
+ [0]=>
+ unicode(1) "a"
+ [1]=>
+ unicode(1) "b"
+ [2]=>
+ unicode(1) "c"
+}
+array(0) {
+}
+Done