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php ajax实现文件上传进度条

日期: 2019-11-14 09:54:21 人气: -

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:


<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> 

 

  

 

  

 

<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> 

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"; 

//phpfensi.com 

} 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。