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php上传文件file实现源代码

时间:2016-12-02 19:38来源:知行网www.zhixing123.cn 编辑:麦田守望者

upoald.hmtl文件

<!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=”upload_s.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>

upload.class.php文件(第二种方法)推荐

<?php
//封装上传Upload类
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’].”/demo/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 ($user_path,0777,true);//切记mkdir的权限
}
//$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”];
}
}
?>

upload_s.php文件(第一种方法)

<?php
// include_once ‘upload.class.php’;//引用封装Upload类文件

//接收
$username=$_POST[‘username’];
$fileintro=$_POST[‘fileintro’];
//第二种方法调用封装Upload类
//$up = new Upload();
//$up->upload_file($username,$fileintro);
//封装Upload类end

//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’].”/demo/up/”.$username;
// echo $user_path;die;
if(!file_exists($user_path)){
mkdir ($user_path,0777,true);//切记mkdir的权限
}
//$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”;
}
?>

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标签(Tag):php php上传文件
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