php检测服务器是否可用 不可用发动钉钉消息

<?php
set_time_limit(0);
//ping一个IP地址，能不能通
function ping($ip)
{
$ip_port = explode(':', $ip);
// var_dump($ip_port);
if (filter_var($ip_port[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) { //IPv6
$socket = socket_create(AF_INET6, SOCK_STREAM, SOL_TCP);
} elseif (filter_var($ip_port[0], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { //IPv4
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
} else {
return false;
} if (!isset($ip_port[1])) { //没有写端口则指定为80
$ip_port[1] = '80';
}
//var_dump($socket);
@$ok = socket_connect($socket, $ip_port[0], $ip_port[1]);
//var_dump(socket_strerror(socket_last_error($socket)));
//var_dump($ok);
socket_close($socket); if ($ok) {
//echo "连接OK\n";
return true;
} else {
//echo "socket_connect() failed.\nReason: ($ok) " . socket_strerror($ok) . "\n";
return false;
}
}function sendMessage($data){
$postUrl = 'http://*****.shtml';//钉钉接口地址
$postData = $data;
//$postData = http_build_query($postData);
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $postUrl);
curl_setopt($curl, CURLOPT_USERAGENT,'Opera/9.80 (Windows NT 6.2; Win64; x64) Presto/2.12.388 Version/12.15');
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); // stop verifying certificate
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_POST, true);
//curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded'));
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
'Content-Type: application/json',
'Content-Length: ' . strlen($postData)
));
curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
$r = curl_exec($curl);
curl_close($curl);
return $r;
}$ipList=array('192.168.2.50');//被监测ip列表
$mobileList=array('1380000000','1381111111');//异常通知钉钉手机号码
$sendData['mobiles']=$mobileList;
$sendData['type']=1;foreach($ipList as $k=>$v){
if(!ping($v)){
$sendData['content']="亲，IP为".$v."的服务器宕机了，快去查看一下吧 ".date('Y-m-d H:i:s');
sendMessage(json_encode($sendData));
}
}