PHP 文件编程综合案例-文件上传的实现

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" ></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"];

}

}

?>