Fix zip file creation on PHP 8 (#320)

Fix zip file creation on PHP 8

Author: alexpott

.travis.yml

@@ -21,7 +21,9 @@ matrix:
       dist: trusty
     - php: 5.6
       dist: trusty
-
+    - php: nightly
+  allow_failures:
+    - php: nightly
 env:
   global:
     - DISPLAY=:99.0
@@ -33,6 +35,8 @@ cache:
 before_install:
   # Install symfony/error-handler on compatible PHP versions to avoid a deprecation warning of the old DebugClassLoader and ErrorHandler classes
   - if [[ "$TRAVIS_PHP_VERSION" != 5.* && "$TRAVIS_PHP_VERSION" != 7.0 ]]; then composer require --no-update --dev symfony/error-handler "^4.4 || ^5.0"; fi;
+  # Set composer's platform to php 7.4 if we're on php 8.
+  - if [[ "$TRAVIS_PHP_VERSION" = "nightly" ]]; then composer config platform.php 7.4.99; fi;
 
 install:
   - composer install -n --prefer-dist

src/Selenium2Driver.php

@@ -1192,7 +1192,7 @@ private function uploadFile($path)
         $tempFilename = tempnam('', 'WebDriverZip');
 
         $archive = new \ZipArchive();
-        $result = $archive->open($tempFilename, \ZipArchive::CREATE);
+        $result = $archive->open($tempFilename, \ZipArchive::OVERWRITE);
         if (!$result) {
           throw new DriverException('Zip archive could not be created. Error ' . $result);
         }