尚锦部落资讯网-php实现大文件上传

　　众所周知php无法上传大文件，即使是修改了php.ini文件，最有效的方法就是将文件分片上传再合并废话不多说，直接上代码

　　index.html文件

<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>文件上传</title>
</head>
<script>
    function upload() {
        var file = $("#upload_file")[0].files[0]// 获取文件对象 
        if (file == undefined) {
            layer.msg("请先选择文件");
            return false;
        }
        var loading = layer.load(1, { shade: false }); // 加载的风格
        var name = file.name; // 文件名
        var size = file.size; // 文件总大小
        var succeed = 0; // 请求成功次数
        var shardSize = 1024 * 1024 * 10; // 这里是分片的文件大小，不要设置太大不然可能OOM
        var shardCount = Math.ceil(size / shardSize); // 计算总片数(向上取整)
        for (var i = 0; i < shardCount; i++) {
            var start = i * shardSize;
            var end = Math.min(size, start + shardSize);
            var form = new FormData();
            form.append("upload_name", name); //文件名称
            form.append("numbers", shardCount); // 总片数
            form.append("number", i + 1); // 当前片
            form.append("data", file.slice(start, end));
            $.ajax({
                url: "upload.php?action=upload",
                type: "POST",
                data: form,
                async: true, // 异步
                processData: false,
                contentType: false,
                success: function (data) {
                    console.log(data);
                    var returnData = $.parseJSON(data);
                    if (returnData.error == 200) {
                        ++succeed;
                        if (succeed == shardCount) {
                            $.ajax({
                                url: "upload.php?action=merge",
                                type: "POST",
                                data: { 'numbers': shardCount, 'upload_name': name },
                                success: function (data) {
                                    var returnData = $.parseJSON(data);
                                    if (returnData.error == 200) {
                                        layer.closeAll();
                                        layer.msg("上传成功");
                                    } else {
                                        layer.closeAll();
                                        layer.msg("其他错误");
                                    }
                                },
                            });
                        }
                    } else {
                        layer.open({ content: "上传失败", time: 2 });

                    }
                },
            });
        }
    }
</script>

<body>
    <p>
        <input type="file" name="" id="upload_file">
    </p>
    <p>
        <button onclick="upload()">上传文件</button>
    </p>
</body>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script src="https://www.layuicdn.com/layui/layui.js"></script>

</html>

　　upload.php文件

<?php

class upload{
    private $path='tmp/'; //临时文件存放目录
    function uploadFile(){
        if(empty($_POST['upload_name'])||empty($_POST['number'])){
            die(json_encode(array('error'=>202, 'message'=>'No parameters!')));
        }
        $name=$_POST['upload_name'];
        $nowShardNumber=$_POST['number'];
        $fileName = $this->path .$name .$nowShardNumber.".tmp";
        $result = move_uploaded_file($_FILES['data']['tmp_name'], $fileName);
        if ($result) {
                echo json_encode(array('error'=>200, 'message'=>'Upload ok'));
        } else {
                echo json_encode(array('error'=>201, 'message'=>'Upload error'));
        }
    }
    function merge()
    {
        if(empty($_POST['upload_name'])||empty($_POST['numbers'])){
            die(json_encode(array('error'=>202, 'message'=>'No parameters!')));
        }
        $fileName = $_POST['upload_name'];//文件名
        $allShardNumber = $_POST['numbers'];//文件总片数
        if(file_exists($fileName)){
            unlink($fileName); //删除已经存在的完整文件
        }
        for($i=1; $i<=$allShardNumber;$i++) {
            $shardFile=$this->path.$fileName.$i.'.tmp';
            if(file_exists($shardFile)){
                file_put_contents($this->path.$fileName,file_get_contents($shardFile), FILE_APPEND); //file_put_contents默认的是重写文件加上FILE_APPEND为追加写入
                @unlink($shardFile); //删除临时文件
            }else{
                break;
            }
        }
        echo json_encode(array('error'=>200, 'message'=>'Merge successful!'));
    }
}

if(isset($_GET['action'])){
    $obj = new upload();
    if($_GET['action']==='upload'){
        $obj->uploadFile();   
    }else{
        $obj->merge();
    }
}else{
    echo json_encode(array('error'=>-1, 'message'=>'Error!'));
}

?>

　　上传一个2.5GB的文件耗时80秒，但是没有完全达到80秒