Description:
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Memcache somehow obtains a reference where none exists. In the example, I set $clave to a string, set $keyword to a copy of $clave (since $clave is a string, I'm assuming it internally is copied by value, not reference, as per the docs?), and then do something with $clave. At the end of this mucking, $keyword is changed, replacing a space with an underscore.

The problem does NOT occur if I say $keyword = substr($clave, 0); instead of $keyword = $clave, so I'm assuming it's somehow obtaining a reference? (The script starts and ends at the <?php and ?> sections, there's nowhere that says global $keyword or anything).

The memcached server version is 1.2.1, running on Apache 2.0.53.


Reproduce code:
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<?php
$a = memcache_pconnect("192.168.1.252", 11211);

$clave = "abc 123";
$keyword = $clave;
echo "K: ".$keyword."<br/>";
$a->get($clave);
echo "K: ".$keyword."<br/>";
?>

Expected result:
----------------
K: abc 123
K: abc 123

Actual result:
--------------
K: abc 123
K: abc_123