<?php
exec("ping www.baidu.com -n 1",$output,$status);
var_dump($output);
var_dump($status);
?>

array(9) {
  [0]=>
  string(0) ""
  [1]=>
  string(65) "Pinging www.a.shifen.com [220.181.111.147] with 32 bytes of data:"
  [2]=>
  string(0) ""
  [3]=>
  string(52) "Reply from 220.181.111.147: bytes=32 time=9ms TTL=51"
  [4]=>
  string(0) ""
  [5]=>
  string(36) "Ping statistics for 220.181.111.147:"
  [6]=>
  string(56) "    Packets: Sent = 1, Received = 1, Lost = 0 (0% loss),"
  [7]=>
  string(46) "Approximate round trip times in milli-seconds:"
  [8]=>
  string(47) "    Minimum = 9ms, Maximum = 9ms, Average = 9ms"
}