Description:
------------
According to the documentation for preg_replace(), double-quotes, apostrophes/single-quotes, backslashes, and nulls are supposed to be returned escaped.  However, only double-quotes and nulls are escaped; apostrophes/single-quotes and backslashes are returned in their original context.

Reproduce code:
---------------
<?php
header('Content-Type: text/plain; charset=US-ASCII');
$inputstring="'\"\0\\";
echo preg_replace('/([\\x00-\\xFF])/e',"strlen('$1').' chars returned ($1)'.\"\r\n\"",$inputstring);
?>


Expected result:
----------------
2 chars returned (\')
2 chars returned (\")
2 chars returned (\0)
2 chars returned (\\)


Actual result:
--------------
1 chars returned (')
2 chars returned (\")
2 chars returned (\0)
1 chars returned (\)