Description:
------------
file_get_contents
It does not return false at the time of time-out

php 7.0.10　(php 5.6 does not have this bug)

open two shell.
(1)
php -S localhost:8080
(2)
php 2.php

Execution result: 1.0 sec , string(0) ""
FAILURE
 Expected result:   1 sec , bool(false)


Test script:
---------------
<?php
// php -S localhost:8080
// php 2.php

ini_set('display_errors', 0);
if (php_sapi_name() == 'cli')
{
	$timeout = 1;
	ini_set('default_socket_timeout', $timeout);
	$st = microtime(TRUE);
	$res = file_get_contents('http://localhost:8080/'. basename(__FILE__));
	$time = microtime(TRUE) - $st;
	ob_start(); var_dump($res); $s = trim(ob_get_contents()); ob_end_clean();
	printf("Execution result: %0.1f sec , %s\n", $time, $s);
	$success = ($res ===FALSE && round($time)<=$timeout);
	echo ($success ? 'Success' : 'FAILURE'). "\n";
	printf(" Expected result: %3d sec , bool(false)\n", $timeout);
}
else
{
	echo "Hello";
	flush();
	sleep(1);
	echo ' world';
}

Expected result:
----------------
bool(false)

Actual result:
--------------
string(0) ""