Description:
------------
file_exists and is_readable return false on windows when file exist but full path is longer than 258 characters. This seems related to MAX_PATH https://msdn.microsoft.com/en-us/library/aa365247%28VS.85%29.aspx#maxpath

The best expected result would be just return true (see box expected result), then these functions should use the unicode version of the windows API.

In case it's not desirable to use the unicode version of the windows API. Then the expected result would be generate PHP Warning. Now it just return a wrong result without notification.

Test script:
---------------
<?php
$foo = 'D:\\dev\\http\\tproj\\app\\cache\\dev_old\\annotations\\72\\5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e436f6e74726f6c6c657223676574416e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b.doctrinecache.data';
$bar = 'D:\\dev\\http\\tproj\\app\\cache\\dev_old\\annotations\\72\\5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e436f6e74726f6c6c657223676574416e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b315d.doctrinecache.data';
$foo_obj = new \SplFileInfo($foo);
$bar_obj = new \SplFileInfo($bar);
var_dump($foo, file_exists($foo), file_exists($foo_obj));
var_dump($bar, file_exists($bar), file_exists($bar_obj));

Expected result:
----------------
D:\dev\http\tproj>php del.php
string(258) "D:\dev\http\tproj\app\cache\dev_old\annotations\72\5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e43
6f6e74726f6c6c657223676574416e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b.doctrinecache.data"
bool(true)
bool(true)
string(262) "D:\dev\http\tproj\app\cache\dev_old\annotations\72\5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e43
6f6e74726f6c6c657223676574416e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b315d.doctrinecache.data"
bool(true)
bool(true)

D:\dev\http\tproj>dir D:\dev\http\tproj\app\cache\dev_old\annotations\72\
 Volume in drive D is Data
 Volume Serial Number is 2E83-BAB4

 Directory of D:\dev\http\tproj\app\cache\dev_old\annotations\72

01-12-2015  15:09    <DIR>          .
01-12-2015  15:09    <DIR>          ..
01-12-2015  15:04                 9 5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e436f6e74726f6c6c65722367657441
6e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b.doctrinecache.data
01-12-2015  15:01                 9 5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e436f6e74726f6c6c65722367657441
6e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b315d.doctrinecache.data
               2 File(s)             18 bytes
               2 Dir(s)   7.241.150.464 bytes free

Actual result:
--------------
D:\dev\http\tproj>php del.php
string(258) "D:\dev\http\tproj\app\cache\dev_old\annotations\72\5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e43
6f6e74726f6c6c657223676574416e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b.doctrinecache.data"
bool(true)
bool(true)
string(262) "D:\dev\http\tproj\app\cache\dev_old\annotations\72\5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e43
6f6e74726f6c6c657223676574416e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b315d.doctrinecache.data"
bool(false)
bool(false)

D:\dev\http\tproj>dir D:\dev\http\tproj\app\cache\dev_old\annotations\72\
 Volume in drive D is Data
 Volume Serial Number is 2E83-BAB4

 Directory of D:\dev\http\tproj\app\cache\dev_old\annotations\72

01-12-2015  15:09    <DIR>          .
01-12-2015  15:09    <DIR>          ..
01-12-2015  15:04                 9 5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e436f6e74726f6c6c65722367657441
6e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b.doctrinecache.data
01-12-2015  15:01                 9 5b53796d666f6e795c42756e646c655c5477696742756e646c655c436f6e74726f6c6c65725c457863657074696f6e436f6e74726f6c6c65722367657441
6e64436c65616e4f7574707574427566666572696e67405b416e6e6f745d5d5b315d.doctrinecache.data
               2 File(s)             18 bytes
               2 Dir(s)   7.241.150.464 bytes free