php大文件切片上传

前端代码

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content=”width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0″>

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后台代码

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class Upload{

private $filepath = ‘./upload’; //上传目录

private $tmpPath; //PHP文件临时目录

private $blobNum; //第几个文件块

private $totalBlobNum; //文件块总数

private $fileName; //文件名

public function __construct($tmpPath,$blobNum,$totalBlobNum,$fileName){

$this->tmpPath = $tmpPath;

$this->blobNum = $blobNum;

$this->totalBlobNum = $totalBlobNum;

$this->fileName = $fileName;

$this->moveFile();

$this->fileMerge();

}

//判断是否是最后一块，如果是则进行文件合成并且删除文件块

private function fileMerge(){

if($this->blobNum == $this->totalBlobNum){

$blob = ”;

for($i=1; $i<= $this->totalBlobNum; $i++){

$blob .= file_get_contents($this->filepath.’/’. $this->fileName.’__’.$i);

}

file_put_contents($this->filepath.’/’. $this->fileName,$blob);

$this->deleteFileBlob();

}

}

//删除文件块

private function deleteFileBlob(){

for($i=1; $i<= $this->totalBlobNum; $i++){

@unlink($this->filepath.’/’. $this->fileName.’__’.$i);

}

}

//移动文件

private function moveFile(){

$this->touchDir();

$filename = $this->filepath.’/’. $this->fileName.’__’.$this->blobNum;

move_uploaded_file($this->tmpPath,$filename);

}

//API返回数据

public function apiReturn(){

if($this->blobNum == $this->totalBlobNum){

if(file_exists($this->filepath.’/’. $this->fileName)){

$data[‘code’] = 2;

$data[‘msg’] = ‘success’;

$data[‘file_path’] = ‘#39;.$_SERVER[‘HTTP_HOST’].dirname($_SERVER[‘DOCUMENT_URI’]).str_replace(‘.’,”,$this->filepath).’/’. $this->fileName;

}

}else{

if(file_exists($this->filepath.’/’. $this->fileName.’__’.$this->blobNum)){

$data[‘code’] = 1;

$data[‘msg’] = ‘waiting for all’;

$data[‘file_path’] = ”;

}

}

header(‘Content-type: application/json’);

echo json_encode($data);

}

//建立上传文件夹

private function touchDir(){

if(!file_exists($this->filepath)){

return mkdir($this->filepath);

}

}

}

//实例化并获取系统变量传参

$upload = new Upload($_FILES[‘file’][‘tmp_name’],$_POST[‘blob_num’],$_POST[‘total_blob_num’],$_POST[‘file_name’]);

//调用方法，返回结果

$upload->apiReturn();

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