我正在使用一个文件上传器，利用Ajax和PHP上传“PDF”类型的文件。文件不能超过5MB。但是，在我提交表单后，会出现一个空白页面，在地址栏中，该页面被称为“processuploads.php”。我有一个名为“processuploads.php”的文件，里面有以下代码。
编辑：我的错误消息现在声明死亡（'上传有问题！是“upload_max_filesize”设置正确吗？'）;
<?php
if(isset($_FILES["FileInput"]) && $_FILES["FileInput"]["error"]== UPLOAD_ERR_OK)
{
############ Edit settings ##############
$UploadDirectory = 'C:\xampp\htdocs\ReportBazaar\reports'; //specify upload directory ends with / (slash)
##########################################
/*
Note : You will run into errors or blank page if "memory_limit" or "upload_max_filesize" is set to low in "php.ini".
Open "php.ini" file, and search for "memory_limit" or "upload_max_filesize" limit
and set them adequately, also check "post_max_size".
*/
//check if this is an ajax request
if (!isset($_SERVER['HTTP_X_REQUESTED_WITH'])){
die();
}
//Is file size is less than allowed size.
if ($_FILES["FileInput"]["size"] > 5242880) {
die("File size is too big!");
}
//allowed file type Server side check
switch(strtolower($_FILES['FileInput']['type']))
{
//allowed file types
case 'application/pdf':
break;
default:
die('Unsupported File!'); //output error
}
$File_Name = strtolower($_FILES['FileInput']['name']);
$File_Ext = substr($File_Name, strrpos($File_Name, '.')); //get file extention
$Random_Number = rand(0, 9999999999); //Random number to be added to name.
$NewFileName = $Random_Number.$File_Ext; //new file name
if(move_uploaded_file($_FILES['FileInput']['tmp_name'], $UploadDirectory.$NewFileName ))
{
die('Success! File Uploaded.');
}else{
die('error uploading File!');
}
}
else
{
die('Something wrong with upload! Is "upload_max_filesize" set correctly?');
}
?>
以下代码位于我的“uploadreports.php”文件中，这是ajax所在的位置以及要提交的表单。
<?php require "header.php";
if(check_login()) {
} else {
header('Location: login.php');
exit;
}
function check_login () {
if(isset($_SESSION['sess_uid']) && $_SESSION['sess_uid'] != '') {
return true;
} else {
false;
}
}
?>
<script type="text/javascript">
$(document).ready(function() {
var options = {
target: '#output', // target element(s) to be updated with server response
beforeSubmit: beforeSubmit, // pre-submit callback
success: afterSuccess, // post-submit callback
uploadProgress: OnProgress, //upload progress callback
resetForm: true // reset the form after successful submit
};
$('#MyUploadForm').submit(function() {
$(this).ajaxSubmit(options);
// always return false to prevent standard browser submit and page navigation
return false;
});
//function after succesful file upload (when server response)
function afterSuccess() {
$('#submit-btn').show(); //hide submit button
$('#loading-img').hide(); //hide submit button
$('#progressbox').delay( 1000 ).fadeOut(); //hide progress bar
}
//function to check file size before uploading.
function beforeSubmit(){
//check whether browser fully supports all File API
if (window.File && window.FileReader && window.FileList && window.Blob)
{
if( !$('#FileInput').val()) //check empty input filed
{
$("#output").html("Are you kidding me?");
return false
}
var fsize = $('#FileInput')[0].files[0].size; //get file size
var ftype = $('#FileInput')[0].files[0].type; // get file type
//allow file types
switch(ftype)
{
case 'application/pdf':
break;
default:
$("#output").html("<b>"+ftype+"</b> Unsupported file type!");
return false
}
//Allowed file size is less than 5 MB (1048576)
if(fsize>5242880)
{
$("#output").html("<b>"+bytesToSize(fsize) +"</b> Too big file! <br />File is too big, it should be less than 5 MB.");
return false
}
$('#submit-btn').hide(); //hide submit button
$('#loading-img').show(); //hide submit button
$("#output").html("");
}
else
{
//Output error to older unsupported browsers that doesn't support HTML5 File API
$("#output").html("Please upgrade your browser, because your current browser lacks some new features we need!");
return false;
}
}
//progress bar function
function OnProgress(event, position, total, percentComplete)
{
//Progress bar
$('#progressbox').show();
$('#progressbar').width(percentComplete + '%') //update progressbar percent complete
$('#statustxt').html(percentComplete + '%'); //update status text
if(percentComplete>50)
{
$('#statustxt').css('color','#000'); //change status text to white after 50%
}
}
//function to format bites bit.ly/19yoIPO
function bytesToSize(bytes) {
var sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB'];
if (bytes == 0) return '0 Bytes';
var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
return Math.round(bytes / Math.pow(1024, i), 2) + ' ' + sizes[i];
}
});
</script>
<div id="pagewrap">
<div id="content">
<!-- /#sidebar -->
<article class="post clearfix">
<header id="titleindex">
<h1 class="post-title">Upload Your PDF Reports</a></h1>
</header>
<form enctype="multipart/form-data" id="MyUploadForm" name="MyUploadForm" action="processuploads.php" method="post">
<p>
<label for="title"><strong>Title: </strong></label>
</p>
<p>
<input type="text" name="title" size="40"/>
</p>
<p>
<label for="description"><strong>Description: </strong></label>
</p>
<p>
<textarea name="description" rows="6" cols="40" id="textareaupload"></textarea>
</p>
<p>
<label for="filepath"><strong>Filepath: </strong></label>
</p>
<p>
<input id="FileInput" name="FileInput" type="file" title="Choose the reports file path" />
</p>
<div id="progressbox" ><div id="progressbar"></div ><div id="statustxt">0%</div></div>
<div id="output"></div>
<br/>
<input type="submit" id="submit-btn" value="Upload" />
<img src="images/ajax-loader.gif" id="loading-img" style="display:none;" alt="Please Wait"/>
</form>
</article>
</div>