我应该怎么做才能在主机上进行Ajax工作？我尝试制作进度条。我想在迭代完成后立即显示"echo <p>$i</p>"。在本地服务器上，"echo <p>$i</p>"工作并在迭代完成时立即显示$ i。在托管<?php
if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
$i = 0;
echo "<p>$i</p>";
flush();
ob_flush();
while ($i < 5) {
$i++;
echo "<p>$i</p>";
flush();
ob_flush();
sleep(1);
}
exit();
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Output PHP Script Progress via Ajax - Basic Example</title>
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css">
</head>
<body>
<div class="container">
<h2>Output PHP Script Progress via Ajax - Basic Example</h2>
<p>Cick button below to run script.</p>
<form class="" role="form" action="/basic.php" method="post">
<button type="submit" class="btn btn-primary">Execute Long PHP Script</button>
</form>
<div id="progress"></div>
</div>
<script src="https://code.jquery.com/jquery-2.2.4.min.js" integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous"></script>
<script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script type="text/javascript" src="./dist/script-basic.min.js"></script>
</body>
</html>
时有效，并且仅在脚本执行后才显示$ i。代码可以在本地服务器上运行，但不能在主机上运行。我认为在托管或请求标头上设置php时遇到麻烦。我试图找到解决此问题的方法，但没有找到。请帮帮我！
PHP和HTML代码：
$(document).ready(function() {
$("form").submit(function(e) {
$.ajax({
url: $(this).attr("action"),
xhrFields: {
onprogress: function(e) {
console.log(e.target.responseText), $("#progress").html(e.target.responseText)
}
},
success: function(e) {
console.log(e), $("#progress").html(e + "<h1>done!</h1>")
}
}), e.preventDefault()
})
});
带有Ajax的JS代码：
git checkout -b prX #branch for pr X
# this is one way I squash
git reset --soft HEAD~4 # set branch pointer 4 revisions back... all changes for featureX are in index
git commit -m "Feature X"
# push this branch so that the PR is created
# then, when the branch is merged to master:
git checkout featureX # original development branch for the feature
git merge -m "merging changes from master" master