PHP大文件上传（切片上传）

由于项目需要，经常要上传几百兆或者几个G的文件。考虑到文件过大，直接上传的话会超出PHP设置的表单提交限制大小，同时会占用较多的系统资源。于是考虑将文件进行切片，然后将切片后的文件统一上传至文件目录，待全部上传成功之后再将其合并成一个文件，同时后台md5验证是否上传成功。

上面的思路是目前上传大容量文件的主要解决方法。

考虑到此种方案，在各大公司都有较好的案例，也就不用自己在进行编写，在网上找到了百度一个团队提供的api。名为：webuploader。

在使用过程中发现文档支持较差，于是对其进行了一些修改，记录如下：

upload.html（选择并上传文件页面）

    
    
    
    
    
    



    
大文件上传测试
    

    

        

            

                

                    
选择文件
                
                

                    开始上传
                
            
        
    

style.css(页面样式)

button, input {
    margin: 0;
    font: inherit;
    color: inherit
}

button::-moz-focus-inner, input::-moz-focus-inner {
    padding: 0;
    border: 0
}

table {
    border-spacing: 0;
    border-collapse: collapse
}

td, th {
    padding: 0
}

.progress {
    height: 20px;
    margin-bottom: 20px;
    overflow: hidden;
    background-color: #f5f5f5;
    border-radius: 4px;
    -webkit-box-shadow: inset 0 1px 2px rgba(0, 0, 0, .1);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, .1)
}

.progress-bar {
    float: left;
    width: 0;
    height: 100%;
    font-size: 12px;
    line-height: 20px;
    color: #fff;
    text-align: center;
    background-color: #337ab7;
    -webkit-box-shadow: inset 0 -1px 0 rgba(0, 0, 0, .15);
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, .15);
    -webkit-transition: width .6s ease;
    -o-transition: width .6s ease;
    transition: width .6s ease
}

.progress-bar-striped, .progress-striped .progress-bar {
    background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    -webkit-background-size: 40px 40px;
    background-size: 40px 40px
}

.progress-bar.active, .progress.active .progress-bar {
    -webkit-animation: progress-bar-stripes 2s linear infinite;
    -o-animation: progress-bar-stripes 2s linear infinite;
    animation: progress-bar-stripes 2s linear infinite
}

.progress-bar-success {
    background-color: #5cb85c
}

.progress-striped .progress-bar-success {
    background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent)
}

.progress-bar-info {
    background-color: #5bc0de
}

.progress-striped .progress-bar-info {
    background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent)
}

.progress-bar-warning {
    background-color: #f0ad4e
}

.progress-striped .progress-bar-warning {
    background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent)
}

.progress-bar-danger {
    background-color: #d9534f
}

.progress-striped .progress-bar-danger {
    background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
    background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent)
}

fileupload.php(文件上传合并操作)

我的目录结构如下：

需要注意的是：上面提供的代码是根据webupload团队公布的代码进行修改而编写的，原因是因为技术文档过于简单，有很多都没有提供。个人认为，既然提供了这种开源的代码，最好还是有一个比较完整的demo比较好。

不过还是感谢webupload团队，贡献了这个api，确实方便了很多。