Selenium Server主要控制浏览器行为，总的来说，Selenium Server由三部分组成：Launcher、Http Proxy、Selenium Core，其中Selenium Core是在Selenium Server启动浏览器时，嵌bai入到浏览器中的。Selenium Core是一堆Javascript函数集合，当Selenium RC通过网络与 Selenium Server通讯时（通过简单的Http Get或Post请求），Selenium Server解析客户端请求为Selenese Command，然后就会调用相应的JS函数来控制浏览器操作。

默认情况下，Selenium服务器在本地主机端口4444上接受命令

<？php
$ selenium_running = false;

$ fp = @fsockopen（’localhost’，4444）；
if（$ fp！== false）{
$ selenium_running = true;
fclose（$ fp）;
}

var_dump（$ selenium_running）;

• By default Selenium server accepts commands on localhost port 4444

  So you could do this:

  I dont personally like using @, but fsockopen insists on throwing a PHP notice, when the connection fails. Having this warning in output or even in log file is just annoying.

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By default Selenium server accepts commands on localhost port 4444

So you could do this:

I dont personally like using @, but fsockopen insists on throwing a PHP notice, when the connection fails. Having this warning in output or even in log file is just annoying.

                                                                    

                                                        
            

I'm trying to run selenium server, and get errors:

rond-macpro:selenium eladb$  java -Dwebdriver.chrome.driver=./chromedriver -r selenium-server-standalone-2.44.0.jar
Unrecognized option: -r
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

and without -r (what is it anyway?)

rond-macpro:selenium eladb$  java -Dwebdriver.chrome.driver=./chromedriver  selenium-server-standalone-2.44.0.jar
Error: Could not find or load main class selenium-server-standalone-2.44.0.jar

how should I start the server?

how do I set a non-default port to listen to?

These two posts: 1 2 - contradicts regarding the syntax. I think.