记得上传文件的时候要大点，不然还没看出来就上传完了，并且上传的文件不要太大，上G的就算了，2G的我试了，PHP受不了，我测试的是300多M的，记得要调整小php.ini参数啊 “选文件=》提交=》获取信息”要一气呵成哦^ ^
<?php $prefix = ini_get('session.upload_progress.prefix'); $name = ini_get('session.upload_progress.name'); $key = $prefix . $name; session_start(); if (isset($_POST['get_info'])) { $logo = $prefix . $_POST['logo']; exit(json_encode($_SESSION[$logo])); } elseif ($_POST) { echo '<script>var finashed = true;</script>'; } ?> <div></div> <form action="index.php" method="POST" enctype="multipart/form-data"> <input type="hidden" value="test"> <input type="file"><br> <input type="submit" value="提交"> <input type="button" value="获取信息"> </form> <script src="https://www.jb51.net/jquery.js"></script> <script> var sto = null; var progress = null; function getUploadInfo() { $.post("index.php", {"get_info": 1, "logo": "test"}, function(data) { data = eval("(" + data + ")"); progress = parseInt(parseInt(data.bytes_processed) * 10000 / parseInt(data.content_length)) / 100 + "%"; document.getElementById("show_info_div").innerHTML = progress; sto = setTimeout("getUploadInfo()", 1000); }); } if (typeof(finashed) !== "undefined") { document.getElementById("show_info_div").innerHTML = "100.00% (上传成功！)"; } </script>