Description:
------------
Sample code:

in PHP 5.5: 
MAX_INT = 2147483647
730022509303030 cast to int => -1671932682, it's OK
730022509303030 key in array => -1671932682, it's OK 

in PHP 7.0:
MAX_INT = 9223372036854775807
730022509303030 cast to int => 730022509303030, it's OK
730022509303030 key in array => -1671932682, WHY!?

See test script.

Test script:
---------------
<?php
	$ar = array();
	$id = (int)730022509303030;
	$ar[$id] = "test";
	var_dump($id);
	var_dump($ar);
?>

Expected result:
----------------
int 730022509303030
array (size=1)
  730022509303030 => string 'test' (length=4)

Actual result:
--------------
int 730022509303030
array (size=1)
  -1671932682 => string 'test' (length=4)