教程吧

本文实例讲述了php+ajax实现带进度条的上传图片功能。分享给大家供大家参考，具体如下：

运行效果图如下：

代码如下：

<?php if(isset($_FILES["FileInput"]) && $_FILES["FileInput"]["error"]== UPLOAD_ERR_OK) { ############ Edit settings ############## $UploadDirectory = 'F:/Websites/file_upload/uploads/'; //specify upload directory ends with / (slash) ########################################## /* Note : You will run into errors or blank page if "memory_limit" or "upload_max_filesize" is set to low in "php.ini". Open "php.ini" file, and search for "memory_limit" or "upload_max_filesize" limit and set them adequately, also check "post_max_size". */ //check if this is an ajax request if (!isset($_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 'image/jpg': case 'image/jpg': case 'image/jpg': case 'image/pjpg': case 'text/plain': case 'text/html': //html file case 'application/x-zip-compressed': case 'application/pdf': case 'application/msword': case 'application/vnd.ms-excel': case 'video/mp4': 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?'); }