php ajax实现文件上传进度条

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php ajax实现文件上传进度条

来源：易贤网阅读：1048 次日期：2016-08-31 15:03:10

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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>

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>

</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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