我试图通过以下代码逐行生成命令执行的输出。 当我运行这个时，我得到输出，但不是逐行，而是在每次冲洗时打印整个缓冲区。我尝试过使用ob_start＆amp; ob_clean但它没有用。
<?php
//header('Content-Encoding: none;');
//header('Content-Type: text/event-stream');
header('Cache-Control: no-cache');
set_time_limit(0);
$handle = popen("dir", "r");
if (ob_get_level() == 0)
ob_start();
while(!feof($handle)) {
$buffer = fgets($handle,4096);
$buffer = trim(htmlspecialchars($buffer));
echo $buffer;
//echo str_pad('', 4096);
ob_flush();
flush();
sleep(1);
}
pclose($handle);
ob_end_flush();
?>
在前端我使用此代码显示输出：
<html>
<head>
<title>Ajax Streaming Test</title>
</head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<body>
<center><a href="#" id="test">Test Ajax Streaming</a></center>
<pre><div id="mydiv"> </div></pre>
<script type="text/javascript">
document.getElementById('test').onclick = function() {
xhr = new XMLHttpRequest();
xhr.open("GET", "new4.php", true);
xhr.onprogress = function(e) {
//alert(e.currentTarget.responseText);
document.getElementById("mydiv").innerHTML += xhr.responseText+"<br>";
}
xhr.onreadystatechange = function() {
if (xhr.readyState == 4) {
console.log("Complete = " + xhr.responseText);
}
}
xhr.send();
var res = xhr.responseText;
};
</script>
</body>
</html>