Description:
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Imploding an array on a Carriage Return (\r) produces unexpected result.

Reproduce code:
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$TestArray[] = "Hrm...something is fishy here.";
$TestArray[] = "It seems that newlines work just fine.";
$TestArray[] = "Carriage Returns no so much";

echo "\nNewline:\n";
echo implode("\n",$TestArray);  //works
echo "\nCarriage Return:\n";
echo implode("\r",$TestArray);  //doesn't work

Expected result:
----------------
It should return

Newline:
Hrm...something is fishy here.
It seems that newlines work just fine.
Carriage Returns no so much
Carriage Return:
Hrm...something is fishy here.
It seems that newlines work just fine.
Carriage Returns no so much


Actual result:
--------------
It produces

Newline:
Hrm...something is fishy here.
It seems that newlines work just fine.
Carriage Returns no so much
Carriage Return:
Carriage Returns no so much just fine.


Notice that the CR result looks like buffer issue, returns mashup of two array values.