diff --git a/src/Symfony/Component/Console/Output/StreamOutput.php b/src/Symfony/Component/Console/Output/StreamOutput.php
index d36e6f9560159..182622a29a5c8 100644
--- a/src/Symfony/Component/Console/Output/StreamOutput.php
+++ b/src/Symfony/Component/Console/Output/StreamOutput.php
@@ -81,17 +81,26 @@ protected function doWrite($message, $newline)
*
* Colorization is disabled if not supported by the stream:
*
- * - Windows != 10.0.10586 without Ansicon, ConEmu or Mintty
+ * - the stream is redirected (eg php file.php >log)
+ * - Windows without VT100 support, Ansicon, ConEmu, Mintty
* - non tty consoles
*
* @return bool true if the stream supports colorization, false otherwise
*/
protected function hasColorSupport()
{
+ if (function_exists('stream_isatty') && !@stream_isatty($this->stream)) {
+ return false;
+ }
if (DIRECTORY_SEPARATOR === '\\') {
+ if (function_exists('sapi_windows_vt100_support')) {
+ $vt100Enabled = @sapi_windows_vt100_support($this->stream);
+ } else {
+ $vt100Enabled = '10.0.10586' === PHP_WINDOWS_VERSION_MAJOR.'.'.PHP_WINDOWS_VERSION_MINOR.'.'.PHP_WINDOWS_VERSION_BUILD;
+ }
+
return
- function_exists('sapi_windows_vt100_support') && @sapi_windows_vt100_support($this->stream)
- || '10.0.10586' === PHP_WINDOWS_VERSION_MAJOR.'.'.PHP_WINDOWS_VERSION_MINOR.'.'.PHP_WINDOWS_VERSION_BUILD
+ $vt100Enabled
|| false !== getenv('ANSICON')
|| 'ON' === getenv('ConEmuANSI')
|| 'xterm' === getenv('TERM');
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