Only call sapi_windows_set_ctrl_handler() for CLI requests (#9771)

src/Composer/Command/CreateProjectCommand.php

@@ -405,7 +405,7 @@ EOT
             }
         }
         // handler Ctrl+C for Windows on PHP 7.4+
-        if (function_exists('sapi_windows_set_ctrl_handler')) {
+        if (function_exists('sapi_windows_set_ctrl_handler') && PHP_SAPI === 'cli') {
             @mkdir($directory, 0777, true);
             if ($realDir = realpath($directory)) {
                 sapi_windows_set_ctrl_handler(function () use ($realDir) {

src/Composer/Installer/InstallationManager.php

@@ -208,7 +208,7 @@ class InstallationManager
         };
 
         $handleInterruptsUnix = function_exists('pcntl_async_signals') && function_exists('pcntl_signal');
-        $handleInterruptsWindows = function_exists('sapi_windows_set_ctrl_handler');
+        $handleInterruptsWindows = function_exists('sapi_windows_set_ctrl_handler') && PHP_SAPI === 'cli';
         $prevHandler = null;
         $windowsHandler = null;
         if ($handleInterruptsUnix) {