PHP Html5上传大文件

html前台代码：

<form id="upload_form" name="upload_form" action="javascript:init();"
method="post" enctype="multipart/form-data">
    <div>
        <label for="file">
            请选择文件
        </label>
        &nbsp;上传到的地址为http://bi.xiaoyou-game.com/upload/类型/文件名
    </div>
    <div>
        <input type="file" id="file" name="file" onchange="fileReady()">
        <div>
            <input type="submit" id="submit" name="submit" value="上传">
            <button id="clear" onclick="clearUploadFile()">
                清除
            </button>
            <div class="upload_message_show">
                <!--进度条-->
                <div class="upload_bar_box">
                    <div class="upload_bar">
                    </div>
                    <span class="upload_percent">
                    </span>
                </div>
                <!--上传剩余时间和上传速度-->
                <div class="upload_count">
                    <div class="left_time">
                        剩余时间 | 00:00:00
                    </div>
                    <div class="speed">
                        100k/s
                    </div>
                </div>
                <!--文件信息-->
                <div class="upload_file_message">
                    <div class="message_box">
                        <div class="upload_file_name">
                        </div>
                        <div class="upload_file_size">
                        </div>
                        <div class="upload_file_type">
                        </div>
                        <div class="upload_file_error">
                        </div>
                        <div class="isCompleted">
                        </div>
                    </div>
                    <!-- <div class="upload_file_preview"></div> -->
                </div>
            </div>
</form>
</div>
<img src="" id="compressTemp" style="display:none;">
<canvas id="canvas" style="display:none;">
</canvas>
<script type="text/javascript" src="http://bi.xiaoyou-game.com/static/js/html5_upload_ano.js">
</script>

html5_upload_ano.js代码：

var nSlice_count = 200,//分段数
    nFactCount,           //实际分段数
    nMin_size      = 0.5,//最小分段大小(M)
    nMax_size     = 5,  //最大分段大小(M)
    nFactSize,           //实际分段大小
    nCountNum     = 0,  //分段标号
    sFile_type,           //文件类型
    nFile_load_size,   //文件上传部分大小
    nFile_size,           //文件大小
    nPreuploaded = 0,  //上一次记录上传部分的大小
    bIs_uploading= false,//是否上传中
    bStart_upload= false,//是否开始上传
    bEnd_upload  = false;//是否上传完成


function init(){
    var $con = document.getElementById("submit").value;

    bStart_upload = ($con=="上传"?true:false);
    if(bStart_upload)
    {
        if(!bEnd_upload)
        document.getElementById("submit").value = "暂停";
    }
    else
    {
        clearTimeout('timer');
        document.getElementById("submit").value = "上传";
    }
    if(!bEnd_upload && bStart_upload)
    startUpload();    
}

function startUpload(){
    var form = document.forms["upload_form"];
    if(form["file"].files.length<=0)
    {
        alert("请先选择文件，然后再点击上传");
        return;
    }    

    var file = form["file"].files[0];

    var get_file_message = (function(){

        var get_message = {
            get_name:function(){
                return file.name;
            },
            get_type:function(){
                return file.type;

            },
            get_size:function(){
                return file.size;
            },
            getAll:function(){
                return {
                    fileName : this.get_name(),
                    fileSize : this.get_size(),
                    fileType : this.get_type()    
                }
            }
        };
        return get_message;
    })();

    var conversion = (function(){
        var unitConversion = {
            bytesTosize:function(data){
                var unit = ["Bytes","KB","MB","GB"];
                var i = parseInt(Math.log(data)/Math.log(1024));
                return (data/Math.pow(1024,i)).toFixed(1) + " " + unit[i];
            },
            secondsTotime:function(sec){
                var h = Math.floor(sec/3600),
                    m = Math.floor((sec-h*3600)/60),
                    s = Math.floor(sec-h*3600-m*60);
                if(h<10) h = "0" + h;
                if(m<10) m = "0" + m;
                if(s<10) s = "0" + s;

                return h + ":" + m + ":" + s + ":";
            }
        };

        return unitConversion;
    })();

    //start sending 
    var reader = new FileReader();
    var timer;

    var fProgress = function(e){
        var fSize = get_file_message.getAll().fileSize;
        timer = setTimeout(uploadCount(e,fSize,conversion),300);
    };

    var floadend = function(e){
        if(reader.error){alert("上传失败,出现未知错误");clearTimeout(timer);return;}
        clearTimeout(timer);
        if(nCountNum+1!=nFactCount)
        {
            if(bStart_upload)
            {
                nCountNum++;
                uploadStart();
                return;
            } else {
                document.querySelector(".speed").innerHTML = "0k/s";
                document.querySelector(".left_time").innerHTML = "剩余时间 | 00:00:00";
                return;
            }        
        }

        bEnd_upload = true;
        document.querySelector(".speed").innerHTML = "0k/s";
        document.querySelector(".left_time").innerHTML = "剩余时间 | 00:00:00";
        document.querySelector(".upload_percent").innerHTML = "100.00%";
        document.getElementById("submit").value = "上传";
        document.querySelector(".upload_bar").style.width = "100%";

        var $res = JSON.parse(e.target.responseText);
        filePreview($res);
        if($res.res=="success") {
            bIs_uploading =true;
            document.querySelector("#package_url").value=$res.package_url;
        }
        document.querySelector(".isCompleted").innerHTML="上传状态: " + (bIs_uploading?"上传完成":"正在上传..");
    };

    var uploadStart = function(){
        var get_all = get_file_message.getAll();
        var start = nCountNum * nFactSize,
            end   = Math.min(start+nFactSize,get_all.fileSize);

        var fData = new FormData();

        fData.append("file",file.slice(start,end));
        fData.append("name",file.name);
        fData.append("size",file.size);
        fData.append("type",file.type);
        fData.append("totalCount",nFactCount);
        fData.append("indexCount",nCountNum);
        
        //fData.append("crc32",CRC32(file.size));
        
        fData.append("trueName",file.name.substring(0,file.name.lastIndexOf(".")));

        if(!sFile_type)
        sFile_type = file.type.substring(0,file.type.indexOf("/"));
        var xhr = new XMLHttpRequest();
        xhr.upload.addEventListener("progress",fProgress,false);
        xhr.addEventListener("load",floadend,false);
        xhr.addEventListener("error",errorUp,false);
        xhr.addEventListener("abort",abortUp,false);
        
        xhr.open("POST","http://bi.xiaoyou-game.com/class/function/");  //后台php路径
        xhr.send(fData);
    };

    reader.onloadstart = function(){
        var get_all = get_file_message.getAll(),
            fName = get_all.fileName,
            fType = get_all.fileType,
            fSize = conversion.bytesTosize(get_all.fileSize);

        document.querySelector(".upload_message_show").style.display = "block";
        document.querySelector(".upload_file_name").innerHTML ="文件名称: " + fName;
        document.querySelector(".upload_file_type").innerHTML ="文件类型: " + fType;
        document.querySelector(".upload_file_size").innerHTML ="文件大小: " + fSize;
        document.querySelector(".isCompleted").innerHTML       ="上传状态: " + (bIs_uploading?"完成":"正在上传中..");

        nFactSize = Math.floor(get_all.fileSize/nSlice_count);
        nFactSize = (nFactSize>=nMin_size*1024*1024?nFactSize:nMin_size*1024*1024);
        nFactSize = (nFactSize<=nMax_size*1024*1024?nFactSize:nMax_size*1024*1024);
        nFactCount= Math.ceil(get_all.fileSize/nFactSize);

        uploadStart();
    };


    reader.readAsBinaryString(file);
}

function uploadCount(e,fSize,conversion){
    var upSize = e.loaded+nCountNum*nFactSize,
        perc = (upSize*100/fSize).toFixed(2) + "%";
    var speed = Math.abs(upSize - nPreuploaded);
    if(speed==0){clearTimeout("timer");return;}
    var leftTime = conversion.secondsTotime(Math.round((fSize-upSize)/speed));
    speed = conversion.bytesTosize(speed)+"/s";
    document.querySelector(".speed").innerHTML = speed;
    document.querySelector(".left_time").innerHTML = "剩余时间 | " + leftTime;
    document.querySelector(".upload_percent").innerHTML = perc;
    document.querySelector(".upload_bar").style.width = perc;
    nPreuploaded = upSize;
}

function messageChange(){
    document.querySelector(".upload_file_name").innerHTML ="文件名称: " ;
    document.querySelector(".upload_file_type").innerHTML ="文件类型: " ;
    document.querySelector(".upload_file_size").innerHTML ="文件大小: " ;
    document.querySelector(".isCompleted").innerHTML       ="上传状态: " ;
    document.querySelector(".upload_bar").style.width = "0%";
    document.querySelector(".upload_percent").innerHTML = "0%";
    //document.querySelector(".upload_file_preview").innerHTML ="";
    document.querySelector(".upload_message_show").style.display = "none";
}

function clearUploadFile(){
    var e = e || event;
    e.stopPropagation();
    e.preventDefault();
    document.getElementById("file").value = "";
    bStart_upload = false;
    messageChange();
}


function fileReady(){
    bIs_uploading = false;
    bEnd_upload = false;
    nCountNum = 0;
    bStart_upload = false;
    messageChange();
}


function errorUp(){
    bStart_upload = false;
    document.querySelector(".upload_file_error").innerHTML = "上传过程中出错";
}

function abortUp(){
    bStart_upload = false;
    document.querySelector(".upload_file_error").innerHTML = "网络故障，请检查重试";
}

function filePreview($src){
    var ftype = sFile_type;
    var $temp;
    var IMGMaxHeight = document.querySelector(".upload_message_show").offsetHeight;
    switch(ftype){
        case "image" :
        $temp = '<img src="source/'+$src.url+'" style="max-height:'+IMGMaxHeight+'px;margin-left:30%;">';
        break;
        case "audio" :
        $temp = '<audio src="source/'+$src.url+'" controls="controls"></audio>';
        break;
        case "video" :
        $temp = '<video src="source/'+$src.url+'" controls="controls"></video>';
        break;
        case "rar":
        $temp = '<span>rar文件；</span>';
        case "zip":
        $temp = '<span>zip文件</span>';
    }
    /*

    if(IsPreview)
    document.querySelector(".upload_file_preview").innerHTML = $temp;*/
}

PHP后台代码：

public function do_upload()
    {

        $fsize = $_POST['size'];
        $findex =$_POST['indexCount'];
        $ftotal =$_POST['totalCount'];
        $ftype = $_POST['type'];
        $fdata = $_FILES['file'];
        $fname = mb_convert_encoding($_POST['name'],"gbk","utf-8");
        $type = end(explode(".",$fname));
        $allowed_type = array('apk','ipa','jpg','png','gif');
        if( !in_array($type,$allowed_type)){
            echo json_encode(array('res' => 'fail'));
            exit;
        }
        
        $truename = mb_convert_encoding($_POST['trueName'],"gbk","utf-8");

        $dir = PACKAGE_URL . $type ; //PACKAGE_URL为绝对路径，/var/www/....
        
        $save = $dir."/".$fname;
        if(!is_dir($dir))
        {
            mkdir($dir);
            chmod($dir,0777);//给文件夹以写的权限
        }

        //读取临时文件内容
        $temp = fopen($fdata["tmp_name"],"r+");//打开
        $filedata = fread($temp,filesize($fdata["tmp_name"]));//读取文件

        //将分段内容存放到新建的临时文件里面
        if(file_exists($dir."/".$findex.".tmp")) unlink($dir."/".$findex.".tmp");//是否存在当前的临时片名
        $tempFile = fopen($dir."/".$findex.".tmp","w+");//打开

        fwrite($tempFile,$filedata);//写入 
        fclose($tempFile);//关闭

        fclose($temp);
    
        if($findex+1==$ftotal)
        {
            if(file_exists($save)) @unlink($save);
            //循环读取临时文件并将其合并置入新文件里面
            for($i=0;$i<$ftotal;$i++)
            {
                $readData = fopen($dir."/".$i.".tmp","r+");
                $writeData = fread($readData,filesize($dir."/".$i.".tmp"));//读取文件

                $newFile = fopen($save,"a+");
                fwrite($newFile,$writeData);
                
                fclose($newFile);
                
                fclose($readData);

                $resu = @unlink($dir."/".$i.".tmp"); 
            }          
            $fnewszie = filesize($dir."/".$fname);

            if($fsize==$fnewszie)
            {
                $test = "succe";
            }else{
                $test = "fail";
            } 
            
            $res = array("res"=>"success","test"=>$test,"fsize"=>$fsize,"newsize"=>$fnewszie,"url"=>mb_convert_encoding($truename."-".$fsize."/".$fname,'utf-8','gbk'),"package_url"=>'http://bi.xiaoyou-game.com/upload/'.$type.'/'.$fname);
    
            echo json_encode($res);
        }
}