PHP 文件编程综合案例-文件上传的实现

2020-03-22 16:33:22

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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" /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"];
}
}
?
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