The content of this article is about the code for file upload in HTML5. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
html code:
<input type="file" onchange="handleUpload()">
javascript code:
function handleUpload(){ var file = document.querySelector('input[type=file]').files[0]; if(!!file) { var reader = new FileReader(); // 读取文件二进制 reader.readAsArrayBuffer(file); reader.onload = function() { upload(this.result, file.name); } } }function upload(binary, filename){ var xhr = new XMLHttpRequest(); // 通过post发送二进制数据,文件信息拼接在url xhr.open('POST', './upload.php?filename=' + filename); xhr.overrideMimeType("application/octet-stream"); if(xhr.sendAsBinary) { xhr.sendAsBinary(binary); }else { xhr.send(binary); } xhr.onload = function() { var res = JSON.parse(xhr.response); if(res.status === 'success') { alert('上传成功'); }else { alert('上传失败'); } } }
php code :
<?php $result = new stdClass(); $fileName = $_GET['filename']; $filePath = './document/'; function binary_to_file($fileName){ // 获取二进制数据 $content = file_get_contents('php://input'); if(empty($content)) { $content = $GLOBALS['HTTP_RAW_POST_DATA']; } $res = file_put_contents($GLOBALS['filePath'] . $fileName, $content, true); return $res; }if(binary_to_file($fileName) === FALSE) { $result->status = 'error'; }else { $result->status = 'success'; }echo json_encode($result);
javascript code:
const LENGTH = 10*1024; // 每次上传10kbvar file, chunks = [], index = 1, // 当前上传块 total; // 总块数function handleUpload() { file = document.querySelector('[type=file]').files[0]; total = Math.ceil(file.size / LENGTH); for(var i = 0; i < total; i++) { chunks[i] = file.slice(i*LENGTH, (i+1)*LENGTH); } upload(chunks, index, total, polling); }function upload(chunks, index, total, callback) { var xhr = new XMLHttpRequest(), chunk = chunks[index - 1], formData = new FormData(); // 表单对象 formData.append('file', chunk); formData.append('index', index); formData.append('total', total); formData.append('filename', file.name); xhr.open('POST', './upload.php'); xhr.send(formData); xhr.onload = function() { var res = JSON.parse(xhr.response); if(typeof callback == 'function') { callback.call(this, res, chunks, index, total); } } }function polling(res, chunks, index, total){ if(res.isFinish) { alert('上传成功') }else { console.log(res.progress); upload(chunks, index + 1, total, polling); } }
php code:
File upload classFileUpload.php
<?php class FileUpload { private $index; private $total; private $filename; private $filePath = './document/'; private $file; private $tmpFile; // 临时文件 function __construct($tmpFile, $index, $total, $filename) { $this->index = $index; $this->total = $total; $this->filename = $filename; $this->tmpFile = $tmpFile; $this->move_file(); } /** * 创建文件夹 * @return bool */ public function touch_dir() { if(!file_exists($this->filePath)) { return mkdir($this->filePath); } } /** * 移动文件 */ public function move_file() { $this->touch_dir(); $this->file = $this->filePath . $this->filename . '_' . $this->index; move_uploaded_file($this->tmpFile, $this->file); } /** * 合并文件 */ public function merge_file() { if($this->index == $this->total) { $mergeFile = $this->filePath . $this->filename; for($i = 1; $i <= $this->total; $i++) { $chunk = file_get_contents($mergeFile.'_'.$i); file_put_contents($mergeFile, $chunk, FILE_APPEND); } $this->del_file(); } } /** * 删除文件 */ public function del_file() { for($i = 1; $i <= $this->total; $i++) { $delFile = $this->filePath . $this->filename. '_' . $i; @unlink($delFile); } } /** * 结果返回 * @return stdClass */ public function getReturn() { $result = new stdClass(); if($this->index == $this->total) { $result->isFinish = TRUE; $this->merge_file(); }else { $result->progess = ($this->index / $this->total); } return $result; } }
Interface call upload.php
:
<?php require './FileUpload.php'; $fileUpload = new FileUpload($_FILES['file']['tmp_name'], $_POST['index'], $_POST['total'], $_POST['filename']); $result = $fileUpload->getReturn(); echo json_encode($result);
Recommended related articles:
css box-sizing attribute (box model ) usage introduction
#Analysis of video (video) element in html5
HTML5 code to implement Rubik’s Cube game
The above is the detailed content of Code for file upload in HTML5. For more information, please follow other related articles on the PHP Chinese website!