Description:
------------
According to the CSV spec at http://rath.ca/Misc/Perl_CSV/CSV-2.0.html , quotes within CSV files can be escaped by "doubling" the quotes. So if you have a CSV file with two values:
  I think this "IS" a bug
  another value
then the CSV file would look like this:
"I think this ""IS"" a bug",another value

However, when reading such a CSV file using fgetcsv, the doubled quotes are not transformed into single quotes as expected. 

Reproduce code:
---------------
<?php
$fp = fopen("csv_file", "w+");
$fields = array();

$fields[0] = '"I think this ""IS"" a bug"';
$fields[1] = "another field";
fwrite($fp, implode(",", $fields));

fseek($fp, 0);
var_dump(fgetcsv($fp, 4096));
?>


Expected result:
----------------
array(2) {
  [0]=>
  string(23) "I think this "IS" a bug"
  [1]=>
  string(13) "another field"
}


Actual result:
--------------
array(2) {
  [0]=>
  string(25) "I think this ""IS"" a bug"
  [1]=>
  string(13) "another field"
}