upload.class.func

<?php

class upload
{
    protected $fileName;
    protected $maxSize;
    protected $allowMime;
    protected $allowExt;
    protected $uploadPath;
    protected $imgFlag;
    protected $fileInfo;
    protected $error;
    protected $ext;
    protected $destination;
    private $uniName;

    /**
     * upload constructor.
     * @param string $fileName
     * @param string $uploadPath
     * @param bool $imgFlag
     * @param int $maxSize
     * @param array $allowExt
     * @param array $allowMime
     */
    public function __construct($fileName = 'myFile', $uploadPath = './uploads', $imgFlag = true, $maxSize = 5242880,
                                $allowExt = array('jpeg', 'jpg', 'png', 'gif'),
                                $allowMime = array('image/jpeg', 'image/png', 'image/gif'))
    {
        $this->fileName = $fileName;
        $this->maxSize = $maxSize;
        $this->allowMime = $allowMime;
        $this->allowExt = $allowExt;
        $this->uploadPath = $uploadPath;
        $this->imgFlag = $imgFlag;
        $this->fileInfo = $_FILES[$this->fileName];
    }

    /**
     * 检测上传文件是否出错
     * @return bool
     */
    protected function checkError()
    {
        if (!is_null($this->fileInfo)) {
            if ($this->fileInfo['error'] > 0) {
                switch ($this->fileInfo['error']) {
                    case 1:
                        $this->error = '超过了PHP配置文件中upload_max_filesize选项的值';
                        break;
                    case 2:
                        $this->error = '超过了表单中MAX_FILE_SIZE设置的值';
                        break;
                    case 3:
                        $this->error = '文件部分被上传';
                        break;
                    case 4:
                        $this->error = "没有选择上传文件";
                        break;
                    case 6:
                        $this->error = "没有找到临时目录";
                        break;
                    case 7:
                        $this->error = "文件不可写";
                        break;
                    case 8:
                        $this->error = "由于PHP的扩展程序中断文件上传";
                        break;
                }
                return false;
            } else {
                return true;
            }
        } else {
            $this->error = "文件上传出错";
            return false;
        }
    }

    /**
     * 检测上传文件的大小
     * @return bool
     */
    protected
    function checkSize()
    {
        if ($this->fileInfo['size'] > $this->maxSize) {
            $this->error = "上传文件过大";
            return false;
        }
        return true;
    }


    /**
     * 检测扩展名
     * @return bool
     */
    protected
    function checkExt()
    {
        $this->ext = strtolower(pathinfo($this->fileInfo['name'], PATHINFO_EXTENSION));
        if (!in_array($this->ext, $this->allowExt)) {
            $this->error = '不允许的扩展名';
            return false;
        }
        return true;
    }

    /**
     * 检测文件的类型
     * @return bool
     */
    protected
    function checkMime()
    {
        if (!in_array($this->fileInfo['type'], $this->allowMime)) {
            $this->error = '不允许的文件类型';
            return false;
        }
        return true;
    }

    /**
     * 检测是否是真实图片
     * @return bool
     */
    protected
    function checkTrueImg()
    {
        if ($this->imgFlag) {
            if (!@getimagesize($this->fileInfo['tmp_name'])) {
                $this->error = "不是真实图片";
                return false;
            }
            return true;
        }
    }

    /**
     * 检测是否通过HTTP POST方式上传的
     * @return bool
     */
    protected
    function checkHTTPPost()
    {
        if (!is_uploaded_file($this->fileInfo['tmp_name'])) {
            $this->error = "文件不是通过HTTP POST方式上传的";
            return false;
        }
        return true;
    }

    /**
     * 显示错误
     */
    protected
    function showError()
    {
        exit('<span style="color:red">' . $this->error . '</span>');
    }

    /**
     * 检测目录不存在则创建
     */
    protected
    function checkUploadPath()
    {
        if (!file_exists($this->uploadPath)) {
            mkdir($this->uploadPath, 0777, true);
        }
    }

    /**
     * 产生唯一字符串
     * @return string
     */
    protected
    function getUniName()
    {
        return md5(uniqid(microtime(true), true));
    }

    /**
     *上传文件
     */
    public
    function uploadFile()
    {
        if ($this->checkError() && $this->checkExt()
            && $this->checkMime() && $this->checkTrueImg()
            && $this->checkHTTPPOST()
        ) {
            $this->checkUploadPath();
            $this->uniName = $this->getUniname();
            $this->destination = $this->uploadPath . "/" . $this->uniName . '.' . $this->ext;
            if (@move_uploaded_file($this->fileInfo['tmp_name'], $this->destination)) {
                return $this->destination;
            } else {
                $this->error = "文件移动失败";
                $this->showError();
            }
        } else {
            $this->showError();
        }
    }
}

test.php

<html>
<head><title></title></head>
<body>
<form action="doAction.php" method="post" enctype="multipart/form-data">
    请选择您要上传的文件：<input type="file" name="myFile1"><br/>
    <input type="submit" value="上传文件">
</form>
</body>
</html>

doAction.php

<?php
header("content-type:text/html;charset=utf-8");
require_once 'upload.class.php';
$upload = new upload('myFile1','imooc');
$dest = $upload->uploadFile();
echo $dest;
?>

Paste_Image.png

Paste_Image.png