服务端
server.php

<?php

set_time_limit ( 0 );

$host = "127.0.0.1";
$port = 2046;

$socket = socket_create ( AF_INET, SOCK_STREAM, SOL_TCP ) or die ( "Could not create	socket</br>\n" ); // 创建一个Socket


$result = socket_bind ( $socket, $host, $port ) or die ( "Could not bind tosocket</br>\n" ); //绑定Socket到端口


$result = socket_listen ( $socket, 3 ) or die ( "Could not set up socket listener</br>\n" ); // 开始监听连接


$spawn = socket_accept ( $socket ) or die ( "Could not accept incoming connection</br>\n" ); // 处理通信


$input = socket_read ( $spawn, 1024 ) or die ( "Could not read input</br>\n" ); // 数据传送 获得客户端的输入


$input = trim ( $input );

if (! empty ( $input )) {
	if ($input == 'time') {
		$output = date ( "Y-m-d H:i:s" ) . "</br>\n"; //处理客户端输入并返回结果
	} else {
		$output = "input error </br>\n"; //处理客户端输入并返回结果
	}
	
	$Send = socket_write ( $spawn, $output, strlen ( $output ) ) or die ( "Could not write output</br>\n" ); //	数据传送 向客户端写入返回结果
	echo 'input:', $input, "</br>\n";
	echo "output:", $output, "</br>\n";
	var_dump ( $Send );
}



/*while ( @$buffer = socket_read ( $socket, 1024, PHP_NORMAL_READ ) ) {
	echo "Data sent was: time</br>\nResponse was:" . $buffer . "</br>\n";
}*/

// 关闭sockets
socket_close ( $spawn );
socket_close ( $socket );
exit ();
?>

客户端
client.php

<?php

set_time_limit ( 0 );

$host = "127.0.0.1";
$port = 2046;

$socket = socket_create ( AF_INET, SOCK_STREAM, SOL_TCP ) or die ( "Could not create	socket</br>\n" ); // 创建一个Socket


$connection = @ socket_connect ( $socket, $host, $port ) or die ( "Could not connet server</br>\n" ); //  连接


socket_write ( $socket, "time" ) or die ( "Write failed</br>\n" ); // 数据传送 向服务器发送消息


while ( @$buffer = socket_read ( $socket, 1024, PHP_NORMAL_READ ) ) {
	echo "Data sent was: time</br>\nResponse was:" . $buffer . "</br>\n";
}

socket_close ( $socket );

?>

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