How to obtain the computer IP, host name, and mac address of all users in php LAN

Introduces in detail the implementation of php to obtain the computer IP, host name, and mac address of all users on the LAN. It is very practical. Friends in need can refer to it

The code is as follows:

<?php
$bIp = gethostbyname($_ENV[&#39;COMPUTERNAME&#39;]); //获取本机的局域网IP
echo "本机IP：",$bIp,"\n";
echo "本机主机名：",gethostbyaddr($bIp),"\n\n\n"; //gethostbyaddr 函数可以根据局域网IP获取主机名
//默认网关IP
list($ipd1,$ipd2,$ipd3) = explode(&#39;.&#39;,$bIp);
$mask = $ipd1 . "." . $ipd2 . "." . $ipd3 ;
exec(&#39;arp -a&#39;,$aIp); //获取局域网中的其他IP
foreach( $aIp as $ipv) {
 if(strpos($ipv,&#39;接口&#39;) !== false) {//一下显示的IP是否是当前局域网中的 而不是其他的类型 可以在cmd下试一下命令
 $bool = false;
 preg_match(&#39;/(?:(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))\.){3}(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))/&#39;,$ipv,$arr);
 if(strcmp($arr[0],$bIp) == 0) {
  $bool = true;
 }
 } else {
 if($bool) {
  $str = preg_replace(&#39;/\s+/&#39;, &#39;|&#39;, $ipv);
  $sArr = explode(&#39;|&#39;,$str);
  if($sArr[1] == &#39;Internet&#39; || empty($sArr[1])) {
  continue;
  }
  //去除默认网关
  if(strcmp($mask . ".1", $sArr[1]) == 0) {
  continue;
  }
  //去除同网关下255的IP
  if(strcmp($mask . ".255", $sArr[1]) == 0) {
  continue;
  }
  //去除组播IP
  list($cIp) = explode(&#39;.&#39;, $sArr[1]);
  if($cIp >= 224 && $cIp <= 239) {
  continue;
  }
  echo "IP地址：|",$sArr[1],"|\n";
  echo "MAC地址：",$sArr[2],"\n";
  echo "主机名：",gethostbyaddr($sArr[1]),"\n";
  echo "\n\n";
 }
 }
}

php implements a complete example of obtaining the computer IP, host name, and mac address of all users on the LAN

This program is run in cli mode, on the browser It should also be possible

php has completed the function of getting the user IP in the LAN. The main ones used are the exec function of php and the arp -a command of window

Get the local IP: gethostbyname ($_ENV['COMPUTERNAME']) is different from the previous writing method. Interested friends can continue to study it in depth.

Get the host name function: gethostbyaddr(IPd) This function is also very powerful.

Recommended learning: php video tutorial

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