selenium部署

1. 安裝selenium：

   composer  require  facebook/webdriver

2. 下載jdk（略）
3. 下載selenium服務：

   https://goo.gl/FCSwwD

4. 運行selenium服務：

   java  -jar  selenium-server-standalone-3.14.0.jar

5. 下載chromedriver：

   https://chromedriver.storage.googleapis.com/2.9/chromedriver_win32.zip

6. 將chromedriver放到chrome安裝目錄下：

   C:\Program Files (x86)\Google\Chrome\Application

7. 移動chromedriver到chrome安裝目錄：
   
8. 添加chrome安裝目錄下環境變量：
   

9. 編寫測試代碼（test.php）：

   <?php
   namespace Facebook\WebDriver;
   use Facebook\WebDriver\Remote\DesiredCapabilities;
   use Facebook\WebDriver\Remote\RemoteWebDriver;
   require_once('vendor/autoload.php');
   header("Content-Type: text/html; charset=UTF-8");
   $waitSeconds = 15;  //需等待加載的時間，一般加載時間在0-15秒，如果超過15秒，報錯。
   $host = 'http://localhost:4444/wd/hub'; // this is the default
   $capabilities = DesiredCapabilities::chrome();
   $driver = RemoteWebDriver::create($host, $capabilities, 5000);
   $baseUrl = 'http://www.bilibili.com/';
   $driver->get($baseUrl);
   echo consoleText($driver->getTitle()) . "\n";    //cmd.exe中文亂碼，所以需轉碼
   $topLists = $driver->findElement(WebDriverBy::className('container-top-wrapper'))->findElement(WebDriverBy::className('top-list-wrapper'))->findElements(WebDriverBy::tagName('li'));
   foreach ($topLists as $topLi) {
   $itemContent = $topLi->findElement(WebDriverBy::tagName('a'));
   echo consoleText($itemContent->getAttribute('title')) . ' : ' . consoleText($itemContent->getAttribute('href')) . "\n";
   }
   //關閉瀏覽器
   $driver->quit();
   function consoleText($text, $pageEncoding = '', $consoleEncoding = '')
   {
   // windows
   if (!$consoleEncoding) {
       if (stristr(php_uname('s'), 'win')) {
           $consoleEncoding = "GBK";
       } else {
           $consoleEncoding = 'UTF-8';
       }
   }
   return exchangeEncoding($text, $pageEncoding, $consoleEncoding);
   }
   function exchangeEncoding($text, $pageEncoding = '', $targetEncoding = 'UTF-8')
   {
   if (!$pageEncoding) {
       $pageEncoding = mb_detect_encoding($text, array("ASCII", 'UTF-8', "GB2312", "GBK", 'BIG5'));
   }
   
   if ($pageEncoding != $targetEncoding) {
       return mb_convert_encoding($text,$targetEncoding,$pageEncoding);
   }
   
   return $text;
   }
   //切換至最后一個window
   function switchToEndWindow($driver)
   {
   
   $arr = $driver->getWindowHandles();
   foreach ($arr as $k => $v) {
       if ($k == (count($arr) - 1)) {
           $driver->switchTo()->window($v);
       }
   }
   }

10. 運行測試代碼：

    php  test.php