Description:
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When a value passed to `fputcsv` ends with the escape character, `fgetcsv` (and `str_getcsv`) do not correctly parse it.

I'm not sure if this is an issue with `fputcsv` not escaping the escape character or `fgetcsv` not handling things properly.

Test script:
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<?php

$input = array(1, 3, '3\\', 5, 3);
$f = fopen('php://temp,', 'w+');
fputcsv($f, $input);
rewind($f);
$output = stream_get_contents($f);

rewind($f);
var_dump($input, $output, str_getcsv($output), fgetcsv($f));
fclose($f);

Expected result:
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I expect `$input` and the results from `str_getcsv` and `fgetcsv` to be the same

Actual result:
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The final three fields, including separators, are parsed as a single field.