PHP 文件编程综合案例-文件上传的实现

PHP文件上传
1、upload.php
复制代码代码如下:
<！DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <title>ddd</title>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
        <！--文件上传要注意:1、要有enctyp，2、method="post"-->
    <form enctype="multipart/form-data" action="uploadProcess.php" method="post" >
        <table>
            <tr><td>请填写用户名</td><td><input type="text" name="username"></td></tr>
            <tr><td>请简单介绍文件</td><td><textarea rows="7" cols="50" name="fileintro" style="width:300px;"></textarea></td></tr>
            <tr><td>请上传你的文件</td><td><input type="file" name="myfile"></td></tr>
            <tr><td colspan="2"><input type="submit" value="上传"><td></tr>
        </table>
    </form>
</body>
</html>

2、uploadProcess.php
复制代码代码如下:
<？php
    //接收
    $username=$_POST["username"];
    $fileintro=$_POST["fileintro"];

    //echo $username.$fileintro;
    //获取文件信息
/*    echo "<pre>";
    print_r（$_FILES）;
    echo "</pre>";
*/
    //获取文件的大小
    $file_size=$_FILES["myfile"]["size"];
    if（$file_size>2*1024*1024）{
        echo "<script type="text/javascript">window.alert（"文件不能大于2M"）</script>";
        exit（）;
    }
    //获取文件类型
    $file_type=$_FILES["myfile"]["type"];
    if（$file_type！="image/jpeg" && $file_type！="image/pjpeg"）{
        echo "文件类型只能是 jpg 格式";
        exit（）;
    }

    //判断上传是否OK
    if（is_uploaded_file（$_FILES["myfile"]["tmp_name"]））{
        //得到上传的文件转存到你希望的目录
        $upload_file=$_FILES["myfile"]["tmp_name"];

        //防止图片覆盖问题，为每个用户建立一个文件夹
        $user_path=$_SERVER["DOCUMENT_ROOT"]."/file/up/".$username;
        if（！file_exists（$user_path））{
            mkdir （$user_path）;
        }
        //$move_to_file=$user_path."/".$_FILES["myfile"]["name"];
        //防止用户上传用户名相同的问题
        $file_true_name=$_FILES["myfile"]["name"];
        $move_to_file=$user_path."/".time（）.rand（1,1000）.substr（$file_true_name,strripos（$file_true_name,"."））;
        //echo $upload_file.$move_to_file;
        //中文要转码
        if（move_uploaded_file（$upload_file,iconv（"utf-8","gb2312","$move_to_file"）））{
            echo $_FILES["myfile"]["name"]."上传成功";
        }else{
            echo "上传失败";
        }
    }else{
        echo "上传失败";
    }
？>

3、封装：
复制代码代码如下:
<？php
    class Upload{
        public $upload_name; //上传文件名
        public $upload_tmp_path; //上传文件保存到服务器的temp路径
        public $file_size;
        public $file_type;
        public $file_save_path;
        function __construct（）{
            $this->upload_name=$_FILES["myfile"]["name"];
            $this->upload_tmp_path=$_FILES["myfile"]["tmp_name"];
            $this->file_size=$_FILES["myfile"]["size"];
            $this->file_type=$_FILES["myfile"]["type"];
            $this->allow_file_type = array（"jpeg","jpg","png","gif","bmp","doc","zip","rar","txt","wps","xlsx","ppt"）;
            $this->file_save_path=$_SERVER["DOCUMENT_ROOT"]."/file/up/";
        }
        public function upload_file（$username）{
            //判断文件大小
            if（$this->file_size>2*1024*1024）{
                echo "<script type="text/javascript">window.alert（"文件不能大于2M"）</script>";
                exit（）;
            }
            //获取文件类型
/*            if（$this->file_type！="image/jpeg" && $this->file_type！="image/pjpeg"）{
                echo "文件类型只能是 jpg 格式";
                exit（）;
            }
*/            //获取文件的扩展名
            $file_type=$this->getFileExt（$this->upload_name）;
            if（！in_array（$file_type,$this->allow_file_type））{
                echo "上传文件类型格式错误";
                exit（）;
            }
            //判断上传是否OK
            if（is_uploaded_file（$this->upload_tmp_path））{

                //防止图片覆盖问题，为每个用户建立一个文件夹
                $user_path=$this->file_save_path.$username;
                if（！file_exists（$user_path））{
                    mkdir （$user_path）;
                }
                //$move_to_file=$user_path."/".$_FILES["myfile"]["name"];
                //防止用户上传用户名相同的问题
                //$file_true_name=$_FILES["myfile"]["name"];
                $move_to_file=$user_path."/".time（）.rand（1,1000）.substr（$this->upload_name,strripos（$this->upload_name,"."））;
                //echo $upload_file.$move_to_file;
                //中文要转码
                if（move_uploaded_file（$this->upload_tmp_path,iconv（"utf-8","gb2312","$move_to_file"）））{
                    echo $this->upload_name."上传成功";
                }else{
                    echo "上传失败";
                }
            }else{
                echo "上传失败";
            }
        }

        //获取文件的扩展名
        public function getFileExt（$filename）{
            $fileExt=pathinfo（$filename）;
            return $fileExt["extension"];
        }
    }
？>