1、php创建socket的方法和设置超时的方法，贴出来分享一下
1 //如果$waitAckSec=0，则返回成功发送的字节�? 2 //如果$waitAckSec大于0，则返回发送后接收到得内容 3 //任何情况下，失败都返回FALSE 4 function sendUdp($host, $port, $buff,$waitAckSec=0) { 5 $socket = ($result = @socket_create(AF_INET,SOCK_DGRAM,SOL_UDP)); 6 //发送超时1秒 7 socket_set_option($socket,SOL_SOCKET,SO_RCVTIMEO,array("sec"=>3, "usec"=>0 ) ); 8 //接收超时6秒 9 socket_set_option($socket,SOL_SOCKET,SO_SNDTIMEO,array("sec"=>6, "usec"=>0 ) ); 10 if($socket){ 11 $result = @socket_sendto($socket,$buff,strlen($buff),0,$host,$port); 12 if($waitAckSec>0){ 13 $result = FALSE; 14 $read = array($socket); 15 $write = NULL; 16 $except = NULL; 17 if(@socket_select($read,$write,$except,$waitAckSec)>0){ 18 $fromHost = ""; 19 $fromPort = 0; 20 @socket_recvfrom($socket,$result,4096,0,$fromHost,$fromPort); 21 $result = phpext_unpack($result); 22 if($result["needAck"] == 1){ 23 $this->sendUdp($host, $port, $result["ackdata"]); 24 if(isset ($result['data']['list']) && isset ($result['data']['totalCount'])){ 25 $list = $result['data']['list']; 26 $count = $result['data']['totalCount']; 27 while($count> count($list)){ 28 @socket_recvfrom($socket,$result_temp,4096,0,$fromHost,$fromPort); 29 $result_temp = phpext_unpack($result_temp); 30 $this->sendUdp($host, $port, $result_temp["ackdata"]); 31 $list = array_merge($list,$result_temp['data']['list']); 32 } 33 $result['data']['list'] = $list; 34 } 35 }else{ 36 @socket_recvfrom($socket,$result,4096,0,$fromHost,$fromPort); 37 $result = phpext_unpack($result); 38 if($result["needAck"] == 1){ 39 $this->sendUdp($host, $port, $result["ackdata"]); 40 if(isset ($result['data']['result']) && isset ($result['data']['userID'])){ 41 $list = $result['data']['list']; 42 $count = $result['data']['totalCount']; 43 while($count> count($list)){ 44 @socket_recvfrom($socket,$result_temp,4096,0,$fromHost,$fromPort); 45 $result_temp = phpext_unpack($result_temp); 46 $this->sendUdp($host, $port, $result_temp["ackdata"]); 47 $list = array_merge($list,$result_temp['data']['list']); 48 } 49 $result['data']['list'] = $list; 50 } 51 } 52 } 53 }else{ 54 $result = SEND_UDP_ERROR; 55 } 56 } 57 @socket_close($socket); 58 } 59 return $result; 60 }