php和c通过socket进行通信

一个php编写的客户端程序和一个用c编写的服务器程序通过socket进行通信的实例

在进行编程之前，我们需要打开socket，打开方法见下：

>gedit .bashrc

add things as follow

exportPATH=/usr/local/php5/bin:$PATH //我的php安装在/usr/local/php5路径下

>source .bashrc

然后：

1. >cd/root/php-5.2.13/ext/sockets //我的php安装包放在/root下

2. >phpize

3. >./configure

4. >make

5. >make install

6. >cp /usr/local/lib/php.ini/usr/local/php5/lib/php.ini

7. >vi /usr/local/php5/lib/php.ini

add things as follow:

extension_dir ="/usr/local/php5/lib/php/extensions/no-debug-non-zts-20060613/"

extension = "sockets.so"

8.>apachectl restart

好了，在重启apache后，我们就可以进行程序的编写了，这两个程序也是网上非常常见的程序，在次借用，也非常感谢程序的原创者。

1. 服务器端程序：server.c

#include <sys/types.h>

#include <sys/socket.h>

#include <string.h>

#include <stdio.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <stdlib.h>

#include <unistd.h>

#include <errno.h>

main(){

int sock;

struct sockaddr_in server,client;

int recvd,snd;

int structlength;

char * server_ip = "128.168.10.1";

int port = 8888;

charrecvbuf[2000],sendbuf[2000];

char str1[]="I have received:\n";

memset((char *)&server,0,sizeof(server));

server.sin_family = AF_INET;

server.sin_addr.s_addr = inet_addr(server_ip);

server.sin_port = htons(port);

memset((char *)&client,0,sizeof(client));

client.sin_family = AF_INET;

client.sin_addr.s_addr = htonl(INADDR_ANY);

client.sin_port = htons(port);

if((sock = socket (AF_INET,SOCK_DGRAM,0)) < 0){

printf("socket create error!\n");

exit(1);

}

structlength = sizeof(server);

if( bind(sock,(struct sockaddr *)&server,structlength) < 0){

printf("socket bind error!\n");

perror("bind");

exit(1);

}

while(1){

structlength =sizeof(client);

printf("waiting.......\n");

recvd = recvfrom(sock,recvbuf,sizeof(recvbuf),0,

(struct sockaddr *) &client,&structlength);

if(recvd < 0){

perror("recvfrom");

exit(EXIT_FAILURE);

}

else{

printf("received:%s\n",recvbuf);

memset(sendbuf,0,strlen(sendbuf));

memcpy(sendbuf,str1,strlen(str1));

snd = sendto(sock,sendbuf,strlen(str1),0,

(struct sockaddr *) &client,structlength);

if(snd < 0){

perror("sendto");

exit(1);

}

printf("sendok!\n");

}

}

close(sock);

}

2.客户端程序

<?php

$server_ip="128.168.10.1";

$port = 8888;

$sock=@socket_create(AF_INET,SOCK_DGRAM,0);

if(!$sock){

echo "socket create failure";

}

if($buf=="")

$buf="hello,how are you!\n";

if(!@socket_sendto($sock,$buf,strlen($buf),0,"128.168.10.1",8888)){

echo "send error\n";

socket_close($sock);

exit();

}

$buf="";

$msg="";

if(!@socket_recvfrom($sock,$msg,256,0,&$server_ip,&$port)){

echo "recvieve error!";

socket_close($sock);

exit();

}

echo trim($msg)."\n";

socket_close($sock);

?>

我们通过一个页面来调用client.php程序，可以传送自己想发送的消息

<form action="client.php"method="post">

<input type=text name=buf>

<input type=submitvalue="submit">

</form>