我有一个正在处理的WOL PHP脚本，我希望找到一种方法来使用ajax刷新部分页面，或者我是否应该调用外部php脚本？
我的PHP脚本启动一台电脑，然后多次检查它是否启动并运行。但是，对于 PHP，用户显然必须等到它完全完成才能显示结果，我希望有一种方法可以使我正在运行的"while 循环"在页面的第一部分加载后运行和更新？
本质上，checkstatus 函数检查端口是否正在运行，然后显示输出。我希望加载主页，然后使用 ajax 或其他 php 脚本更新端口检查的状态？ 不知道怎么做。
function CheckStatus($tries, $device, $deviceip, $deviceport, $devicemac1, $devicemac2, $maxtries, $broadcast, $udport, $timeout){
while($tries <= $maxtries){
echo "<br '>";
echo "Try $tries of $maxtries";
echo "<br '>";
//echo portcheck($deviceip, $deviceport);
if (portcheck($deviceip, $deviceport) != 0){
echo " ------> Could NOT open connection to $device at $deviceip on port $deviceport";
echo "<br '>";
//echo "<br /> TRIES: $tries";
}else{
echo "<br '>";
echo "<br '>";
echo "<br '>";
echo "TESTED OKAY! $device";
return TRUE;
}
$tries=$tries + 1;
}
echo "<br />";
echo "MAX TRIES REACHED... COULD NOT CONNECT!";
return FALSE;
}
在发表评论说"你不能在 PHP 的单个实例中做到这一点"之后，我现在将继续证明自己错了。
可以使用一种服务器推送设置来执行此操作。请考虑以下代码：
<?php
// Do all your preliminary stuff here
?>
<html>
<head>
<title>Server push demo</title>
<script type="text/javascript">
function updateTries(tries) {
document.getElementById('num_tries').innerHTML = tries;
}
function pushEvent(str) {
var event = document.createElement('div');
event.innerHTML = str;
document.getElementById('stream_container').appendChild(event);
}
</script>
</head>
<body>
<div>
Number of tries:
<span id="num_tries"></span>
</div>
<div id="stream_container"></div>
<?php
// Push all output so far to the client
flush();
// Start status check loop
CheckStatus($tries, $device, $deviceip, $deviceport, $devicemac1, $devicemac2, $maxtries, $broadcast, $udport, $timeout);
function CheckStatus($tries, $device, $deviceip, $deviceport, $devicemac1, $devicemac2, $maxtries, $broadcast, $udport, $timeout){
while ($tries < $maxtries) {
echo "<script type='text/javascript'>updateTries($tries);</script>";
flush();
if (portcheck($deviceip, $deviceport) != 0){
echo "<script type='text/javascript'>pushEvent('Could NOT open connection to $device at $deviceip on port $deviceport');</script>";
flush();
} else {
echo "<script type='text/javascript'>pushEvent('TESTED OKAY! $device');</script>";
flush();
return TRUE;
}
$tries++;
}
echo "<script type='text/javascript'>pushEvent('MAX TRIES REACHED... COULD NOT CONNECT!');</script>";
flush();
return FALSE;
}
?>
</body></html>
但是，我仍然认为最好将循环抽象到客户端并使用 AJAX 轮询服务器，服务器一次执行一次检查。