Description:
------------
Hi, there is an issue when detecting broken socket connections:
The behavour is different between 7.0.2 and 7.0.4

According to documentation fwrite should
"fwrite() returns the number of bytes written, or FALSE on error."

But it returns 0 (int) instead of FALSE (bool) and generates NOTICE.


Also feof() never works on 7.0.2 (MacOSX) but works on 7.0.4 on Ubuntu 
             if (feof($fp)) {
                 echo 'FEOF detected';
             }

Test script:
---------------
Open 2 terminals and launch

1# php server.php
2# php client.php

Then press CTRL+C on server.php terminal:


https://gist.github.com/sshilko/443ae40a4d115ca8325b

Expected result:
----------------
Written result bool(FALSE)

Actual result:
--------------
$ php server.php
Dispatching...
RCV: 12325 Message to send...1459092741
RCV: 12325 Message to send...1459092742
RCV: 12325 Message to send...1459092743
RCV: 12325 Message to send...1459092744
RCV: 12325 Message to send...1459092745
^C


$ php client.php
SS result=bool(true)
Written result:int(35)
Written=35
SS result=bool(true)
Written result:int(35)
Written=35
SS result=bool(true)
Written result:int(35)
Written=35
SS result=bool(true)
Written result:int(35)
Written=35
SS result=bool(true)
Written result:int(35)
Written=35
SS result=bool(true)
PHP Notice:  fwrite(): send of 35 bytes failed with errno=32 Broken pipe in /home/ubuntu/client.php on line 18
Written result:int(0)
Array
(
    [timed_out] =>
    [blocked] =>
    [eof] =>
    [stream_type] => tcp_socket/ssl
    [mode] => r+
    [unread_bytes] => 0
    [seekable] =>
)
FEOF detectedWritten=0
SS result=bool(true)
PHP Notice:  fwrite(): send of 35 bytes failed with errno=32 Broken pipe in /home/ubuntu/client.php on line 18
Written result:int(0)
Array
(
    [timed_out] =>
    [blocked] =>
    [eof] => 1
    [stream_type] => tcp_socket/ssl
    [mode] => r+
    [unread_bytes] => 0
    [seekable] =>
)
FEOF detected^C