Description:
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In PHP 8.0, two different sockets compare as equal.
This is a regression versus PHP 7.x.

I use PHP for writing internet servers, and upgrading to 8.0 sees most of them failing.  Simple constructs such as, $socknum = array_search($sock, $sockets)
no longer function as they intuitively ought to.

As an aside, it used to be convenient to do, $array[(int)$socket] = $socket;
But in 8.0, (int) $socket bombs, and var_export($socket, true) returns the same value regardless of what's in the socket.

Test script:
---------------
#!/usr/bin/php
<?php

$socket_1 = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$socket_2 = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$vector   = array(1 => $socket_1,
                  2 => $socket_2);
$IDX_1    = array_search($socket_1, $vector);
$IDX_2    = array_search($socket_2, $vector);
$V        = substr(PHP_VERSION, 0, 3);

echo "In PHP {$V}:\n".
     "\tSocket 1 was found at array index {$IDX_1}, and\n".
     "\tSocket 2 was found at array index {$IDX_2}.\n";

socket_close($socket_1);
socket_close($socket_2);
?>

Expected result:
----------------
~$ /tmp/socket-compare-test.php 
In PHP 7.3:
        Socket 1 was found at array index 1, and
        Socket 2 was found at array index 2.


Actual result:
--------------
~$ /tmp/socket-compare-test.php 
In PHP 8.0:
        Socket 1 was found at array index 1, and
        Socket 2 was found at array index 1.