進度條即電腦在處理任務時，即時的，以圖片形式顯示處理任務的速度，完成度，剩餘未完成任務量的大小，和可能需要處理時間，一般以長方形條狀顯示。這篇文章主要介紹了php ajax實現文件上傳進度條的相關資料,需要的朋友可以參考下，本實例是關於php文件上傳時進度條的實現，主要採用ajax技術，另外還運用了html5 ，有需要的朋友可以研究一下。
本實例有兩個檔案：
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>登入後複製
##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";
}
?>登入後複製
以上是php+ajax實作檔上傳進度條效果範例程式碼的詳細內容。更多資訊請關注PHP中文網其他相關文章！
