php ping ip

函數：

<?php

  function ping($ip, $times=4){
      $info = array();
      if (!is_numeric($times) || $times-4<0) {
          $times = 4;
      }
      if (PATH_SEPARATOR==':' || DIRECTORY_SEPARATOR=='/') {  //linux
          exec("ping $ip -c $times", $info);
          if (count($info) < 9) {
              $info['error'] = 'timeout';
          }
      } else {                                           //windows
          exec("ping $ip -n $times", $info);
          if (count($info) < 10) {
              $info['error'] = 'timeout';
          }
      }
      return $info;
  }
  $ip = '127.0.0.1';
      print_r(ping($ip));

?>

成功：

Array
(
    [0] => PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
    [1] => 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.052 ms
    [2] => 64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.055 ms
    [3] => 64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.039 ms
    [4] => 64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.046 ms
    [5] =>
    [6] => --- 127.0.0.1 ping statistics ---
    [7] => 4 packets transmitted, 4 received, 0% packet loss, time 3000ms
    [8] => rtt min/avg/max/mdev = 0.039/0.048/0.055/0.006 ms
)
[Finished in 3.1s]

失敗：

Array
(
    [0] => PING 192.168.10.198 (192.168.10.198) 56(84) bytes of data.
    [1] => From 192.168.10.195 icmp_seq=1 Destination Host Unreachable
    [2] => From 192.168.10.195 icmp_seq=2 Destination Host Unreachable
    [3] => From 192.168.10.195 icmp_seq=3 Destination Host Unreachable
    [4] => From 192.168.10.195 icmp_seq=4 Destination Host Unreachable
    [5] =>
    [6] => --- 192.168.10.198 ping statistics ---
    [7] => 4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 6001ms
    [8] => pipe 4
)
[Finished in 6.0s]