$fp = fopen(sprintf("tmp/wk_exam_examination.%d.lock", $userid % 10), "w");
if (!flock($fp, LOCK_EX | LOCK_NB)) {
?>
<style>
#info {
text-align: center;
margin: 50px 0;
}#info td {
font-size: 36px;
color: seagreen;
}
</style>
<div id='info'></div>
<script>
let sec = 5000
setTimeout(function () {
window.location.reload()
}, sec)
setInterval(function () {
sec -= 100
if (sec >= 0) {
let ok = sec / 1000
document.getElementById('info').innerHTML = `<table style="margin: 0 auto;">
<tr><td style='width: 50%; text-align: right;'>页面排队中...</td>
<td style="width: 2em; text-align: center;">${ok}</td><td>秒后将重试!</td></tr></table>`;
}
}, 100)
</script><?php
die;
}