PHP 文件编程综合案例-文件上传的实现

PHP文件上传
1、upload.php


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


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：


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"];
        }
    }
?>