自定义MVC框架之工具类-文件上传类

截止目前已经改造了3个类:

ubuntu:通过封装验证码类库一步步安装php的gd扩展

自定义MVC框架之工具类-分页类的封装

该文件上传类功能如下：

1，允许定制上传的文件类型，文件mime信息，文件大小

2，自由定制文件名是随机还是保持原来的文件名

3，谨慎的检查，友好的错误提示，精确定位文件上传哪一步出问题

测试结果：

ghostwu@ghostwu:~/php/senior_php/upload$ tree
.
├── 19502QV8-6.jpg
├── Upload
│   ├── ghostwu_5a94beb3b2690.jpg
│   ├── ghostwu_5a94c727a1f1a.php
│   └── ghostwu_5a94c740615dc.html
├── upload.html
└── upload.php

upload.php:

<meta charset="utf-8" />
<?php
    
class Upload {
    //上传路径
    private $path = './Upload';
    //允许的文件类型
    private $allowFileType = [ 'jpg', 'png', 'jpeg', 'wbmp', 'gif' ];
    //允许的mime信息
    private $allowMime = [ 'image/jpeg', 'image/gif', 'image/png', 'image/wbmp' ];
    //允许的最大文件大小
    private $maxSize = 2048000;
    //运行随机文件名
    private $enableRandName = true;
    //文件前缀
    private $prefix = 'ghostwu_';

    //错误号
    private $errorNo;
    //错误信息
    private $errorInfo;
    
    //文件原来的名称
    private $originName;
    //新的文件名称
    private $newName;
    //文件后缀
    private $suffix;
    //文件大小
    private $size;
    //文件mime信息
    private $mime;
    //临时文件名
    private $tmpName;


    public function __construct( $fileInfo = [] ){
        foreach ($fileInfo as $k => $v ) {
            $this->setProperty( $k, $v );
        }
    }

    //设置成员属性
    public function setProperty( $k, $v ){
        $property = array_keys( get_class_vars( __CLASS__ ) );
        if( in_array( $k, $property ) ){
            $this->$k = $v;
        }
    }    

    public function __get( $key ) {
        if( $key == 'errorNo' ) {
            return $this->errorNo;
        }else if ( $key == 'errorInfo' ) {
            return $this->getErrorInfo();
        }
    }

    protected function getErrorInfo(){
        $info = '';
        switch( $this->errorNo ){
            case 1000:
                $info = '没有设置上传路径';
                break;
            case 1001:
                $info = '上传路径不存在，或者没有写权限';
                break;
            case 1002:
                $info = '文件大小超过限制';    
                break;
            case 1003:
                $info = '文件的mime信息不在允许范围内';
                break;
            case 1004:
                $info = '不允许上传这种类型的文件';
                break;
            case 1006:
                $info = '文件不是通过表单上传的';
                break;
            case 1007:
                $info = '文件移动失败';
                break;
            case 1:
                $info = '文件超出php.ini设置的大小';
                break;
            case 2:
                $info = '超出html表单设置的大小';
                break;
            case 3:
                $info = '文件只有部分被上传';
                break;
            case 4:
                $info = '没有文件被上传';
                break;
            case 6:
                $info = '找不到临时文件';
                break;
            case 7:
                $info = '文件写入失败';
                break;
        }

        return $info;
    }

    protected function check(){
        if( !file_exists( $this->path ) || !is_dir( $this->path ) ){
            return mkdir( $this->path, 0777, true );
        }
        if( !is_writable( $this->path ) ){
            return chmod( $this->path, 0777 );
        }
        return true;
    }

    public function upload( $name ){
        //判断是否设置了上传路径
        if( empty( $this->path ) ) {
            $this->setProperty( 'errorNo', 1000 );
            return false;
        }
        //判断路径是否存在，可写
        if( !$this->check() ) {
            $this->setProperty( 'errorNo', 1001 );
            return false;
        }
        //判断上传文件是否错误，提取原文件信息
        $errorno = $_FILES[$name]['error'];
        if( $errorno ) {
            $this->setProperty( 'errorNo', $errorno );
            return false;
        }else {
            $this->getFileInfo( $name );
        }
        //判断文件是否符合上传要求(大小,后缀,mime)
        if( !$this->checkSize() 
            || !$this->checkMime()
            || !$this->checkSuffix() ) {
            return false;
        }
        //生成新的文件名
        $this->newName = $this->createNewName();
        //判断是否为上传文件
        if( is_uploaded_file( $this->tmpName ) ) {
            if( move_uploaded_file( $this->tmpName, $this->path . '/' . $this->newName ) ){
                return $this->path . '/' . $this->newName;
            }else {
                $this->setProperty( 'errorNo', 1007 );
                return false;
            }
        }else {
            $this->setProperty( 'errorNo', 1006 );
            return false;
        }
    }

    protected function createNewName(){
        if ( $this->enableRandName ) {
            $name = $this->prefix . uniqid() . '.' . $this->suffix;
        }else {
            $name = $this->prefix . $this->originName;
        }
        return $name;
    }

    protected function getFileInfo( $name ){
        $this->originName = $_FILES[$name]['name'];
        $this->mime = $_FILES[$name]['type'];
        print_r( $this->mime );
        $this->tmpName = $_FILES[$name]['tmp_name'];    
        $this->size = $_FILES[$name]['size'];
        $this->suffix = pathinfo( $this->originName )['extension'];
    }

    protected function checkSize(){
        if( $this->size > $this->maxSize ) {
            $this->setProperty( 'errorNo', 1002 );
            return false;
        }
        return true;
    }

    protected function checkMime(){
            print_r( $this->allowMime );
        if( !in_array( $this->mime, $this->allowMime ) ) {
            $this->setProperty( 'errorNo', 1003 );
            return false;
        }
        return true;
    }

    protected function checkSuffix(){
        if( !in_array( $this->suffix, $this->allowFileType ) ) {
            $this->setProperty( 'errorNo', 1004 );
            return false;
        }
        return true;
    }

}

$upload = new Upload( [ 'maxSize' => 204800 ] );
$upload->setProperty( 'allowFileType', ['jpg','jpeg', 'gif', 'php', 'html'] );
$upload->setProperty( 'allowMime', [ 'image/jpeg', 'image/gif', 'image/wbmp', 'application/x-php', 'text/html'  ] );

$upload->upload( 'photo' );

echo $upload->errorNo . '<br/>';
echo $upload->errorInfo . '<br/>';

?>

upload.html

<!DOCTYPE html>
<html>
        <head>
                <meta charset="utf-8" />
                <meta name="viewport" content="width=device-width" />
                <title>文件上传-by ghostwu</title>
        </head>
        <body>
            <form action="upload.php" method="post" enctype="multipart/form-data" >
                <input type="file" name="photo" id="photo" />    
                <input type="submit" name="upload" id="upload" value="上传" />
            </form>
        </body>
</html>