在Windows的cmd中运行服务器

我在PHP中创建了一个简单的客户端服务器代码，并通过浏览器中的Wamp服务器本地主机运行它。它可以工作，但是当我在cmd中运行它时，输出如下所示：

c:'wamp'www'Converter>php testserver.php
PHP Fatal error:  Call to undefined function socket_create() in C:'wamp'www'Converter'testserver.php on line 15
PHP Stack trace:
PHP   1. {main}() C:'wamp'www'Converter'testserver.php:0
Fatal error: Call to undefined function socket_create() in C:'wamp'www'Converter'testserver.php on line 15
Call Stack:
0.0005     248032   1. {main}() C:'wamp'www'Converter'testserver.php:0

c:'wamp'www'Converter>php ex3_server.php
PHP Fatal error:  Call to undefined function socket_create() in C:'wamp'www'Converter'ex3_server.php on line 5
PHP Stack trace:
PHP   1. {main}() C:'wamp'www'Converter'ex3_server.php:0
Fatal error: Call to undefined function socket_create() in C:'wamp'www'Converter'ex3_server.php on line 5
Call Stack:
0.0002     232968   1. {main}() C:'wamp'www'Converter'ex3_server.php:0`

为什么会这样？我需要在窗口中编辑任何设置吗？它似乎可以通过浏览器工作，但我需要通过cmd运行服务器才能查看统计信息。我的服务器代码如下：

<?php
//server_side
$address="localhost";//your ip
$port="10012";//port number
$socket=socket_create(AF_INET,SOCK_STREAM,0);
if($socket)
    echo "<br>Successfully socket created<br>";
else
    echo "<br>Cannot create socket<br>";
$bind=socket_bind($socket,$address,$port);
if($bind)
    echo "<br>Successfully binded to socket<br>";
else
    echo "<br>Cannot bind socket<br>";
//listens for a connection on a socket
$listen=socket_listen($socket) or die ("could not setup");
if($listen)
    echo "<br>Successfully listen connection<br>";
else
    echo "<br>Cannot listen connection<br>";
//accepts a connection on a socket
$accept=socket_accept($socket) or die ("could not accept");
if($accept)
    echo "<br>Successfully accepted request<br>";
else
    echo "<br>Connot accept request<br>";
//send message 1
$message1="Hello Client";
$write=socket_write($accept,$message1);
//read reply2
$read2=trim(socket_read($socket,1024));
echo $read2."'n";
?>