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phpajax实现文件上传进度

时间:2021-01-13

来源:互联网

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这篇文章主要介绍了php ajax实现文件上传进度条的相关资料,需要的朋友可以参考下

本实例是关于php文件上传时进度条的实现,主要采用ajax技术,另外还运用了html5,有需要的朋友可以研究一下。

本实例有两个文件:

upload_form.html:

<!DOCTYPE html>

<html>

<head>

<script>

function _(el){

  return document.getElementById(el);

}

function uploadFile(){

  var file = _("file1").files[0];

  // alert(file.name+" | "+file.size+" | "+file.type);

  var formdata = new FormData();

  formdata.append("file1", file);

  var ajax = new XMLHttpRequest();

  ajax.upload.addEventListener("progress", progressHandler, false);

  ajax.addEventListener("load", completeHandler, false);

  ajax.addEventListener("error", errorHandler, false);

  ajax.addEventListener("abort", abortHandler, false);

  ajax.open("POST", "file_upload_parser.php");

  ajax.send(formdata);

}

function progressHandler(event){

  _("loaded_n_total").innerHTML = "Uploaded "+event.loaded+" bytes of "+event.total;

  var percent = (event.loaded / event.total) * 100;

  _("progressBar").value = Math.round(percent);

  _("status").innerHTML = Math.round(percent)+"% uploaded... please wait";

}

function completeHandler(event){

  _("status").innerHTML = event.target.responseText;

  _("progressBar").value = 0;

}

function errorHandler(event){

  _("status").innerHTML = "Upload Failed";

}

function abortHandler(event){

  _("status").innerHTML = "Upload Aborted";

}

</script>

</head>

<body>

<h2>HTML5 File Upload Progress Bar Tutorial</h2>

<form id="upload_form" enctype="multipart/form-data" method="post">

 <input type="file" name="file1" id="file1"><br>

 <input type="button" value="Upload File" onclick="uploadFile()">

 <progress id="progressBar" value="0" max="100" style="width:300px;"></progress>

 <h3 id="status"></h3>

 <p id="loaded_n_total"></p>

</form>

</body>

</html>

file_upload_parser.php:

<?php

$fileName = $_FILES["file1"]["name"]; // The file name

$fileTmpLoc = $_FILES["file1"]["tmp_name"]; // File in the PHP tmp folder

$fileType = $_FILES["file1"]["type"]; // The type of file it is

$fileSize = $_FILES["file1"]["size"]; // File size in bytes

$fileErrorMsg = $_FILES["file1"]["error"]; // 0 for false... and 1 for true

if (!$fileTmpLoc) { // if file not chosen

  echo "ERROR: Please browse for a file before clicking the upload button.";

  exit();

}

if(move_uploaded_file($fileTmpLoc, "test_uploads/$fileName")){

  echo "$fileName upload is complete";

} else {

  echo "move_uploaded_file function failed";

}

?>

以上就是本文的全部内容,希望对大家的学习有所帮助。

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