我有这个JavaScript代码每5秒刷新一次watcher.php
文件,效果很好。第一页加载很好但是在5秒之后等等while
循环被杀死了。有什么原因吗?
index.php
档<script type="text/javascript">
var auto_refresh = setInterval(function(){
$('.view').load('watcher.php');
}, 5000); // refresh div time
</script>
<body>
<div class="view">
<?php include 'watcher.php'; ?>
</div>
</body>
...
watcher.php
档include 'config.php';
$sql = "SELECT id, name, available, will_return, status FROM check_in_out";
$result = $conn->query($sql);
echo '<div style="margin-top:35px;"><center>';
echo '<table class="pure-table">
<thead>
<tr>
<th>Name</th>
<th>Available</th>
<th>Status/Comments</th>
<th>I\'ll Return At:</th>
<th>Returned</th>
</thead>
</tr>
';
if ($result->num_rows > 0) {
$i = 1;
// output data of each row
while ($row = $result->fetch_assoc()) {
echo '<tr>';
echo '<td><img style="vertical-align:middle" src="imgs/card.jpg"> <a class="various" href="#'.$i.'"/>'.$row["name"];'</a></td>';
echo "<td>";
if ($row['available'] == 1) {
echo "<img src='imgs/available.gif'/>";
echo "Online";
} else {
echo "<img src='imgs/not-available.gif'/>";
echo "<span style='vertical-align:middle'>Away</span>";
};
echo "</td>";
echo '<td>'.$row["status"];'</td>';
echo '<td>'.$row["will_return"];'</td>';
echo '<td></td>';
echo '</tr>';
echo '<div align="center" id="'.$i++.'" style="display:none;width:520px;">
<h2>'.$row["name"].'</h2>
<!-- <h4>Current Status: '.$row["status"].'</h4> -->
<form method="post" action="statusChange.php" />
<input type="hidden" value="'.$row["id"].'" name="id"/>
<textarea rows="4" cols="50" placeholder="Enter Comment/Status Here..." name="comment"></textarea>
<br/><br/>
When will you return? - <input type="time" name="e_time">
<br/><br/>
<input class="pure-button pure-button-primary" type="submit" value="Leave/Return">
</form>
</div>';
}
} else {
echo "0 employees";
}
echo '</tr></table>';
echo '</div></center>';
$conn->close();
这是看下面的图像。你会注意到在第一次加载(5秒)后,可点击的(href)被杀死了......
答案 0 :(得分:2)
<script type="text/javascript">
var updateWatcher = function() {
$.ajax({
url: 'watcher.php',
success: function(response) {
$('.view').html(response);
window.setTimeout(function(){
updateWatcher();
}, 3500);
}
});
}
updateWatcher();
</script>
当然,这可以用promises之类的东西更优雅地解决,但就简单的修复而言,你可以尝试这样的事情,只有在成功收到响应后才设置定时器。这应该更可靠。
这是一个简单的小提琴:http://jsfiddle.net/agentfitz/26mahomm/3/(在控制台中查看)。