面向对象方式编写文件上传类
uploadPic.class.php
<?php
/**
文件上传类
*/
class uploadPic
{
// 定义成员变量
private $allow_type = array('image/jpeg','image/pjpeg','image/png','image/x-png','image/gif');
private $max_size = 1048576;
private $upload_path = 'C:/wamp/www/phpProj/upload/';
private $error = '';
/**
构造方法
$param 用来修改成员属性的数组数据
*/
public function __construct($param)
{
if (isset($param['allow_type'])) $this->allow_type = $param['types'];
if (isset($param['max_size'])) $this->max_size = $param['size'];
if (isset($param['upload_path'])) $this->upload_path = $param['path'];
}
/**文件上传函数
* $file 包含文件上传的5个信息数据
* $prefix 前缀
*/
public function upload($file,$prefix = ''){
// 判断文件是否有错误
if($file['error'] != 0){
$upload_error = array(
1 => '文件过大，超出PHP配置的限制',
2 => '文件过大，超出Form表单中的限制',
3 => '文件未上传完毕',
4 => '文件没有上传',
5 => '',
6 => '没有找到临时上传目录',
7 => '临时文件写入失败'
);
$this->error = isset($upload_error[$file['error']]) ? $upload_error[$file['error']] : '未知错误';
return false;
}
// 判断类型是否在$allow_type中
if (!in_array($file['type'],$this->allow_type)){
$this->error = '此类型的图片不支持上传！图片类型请参考：'.implode('|',$this->allow_type);
return false;
}
// 判断文件是否超出$max_size规定值
if ($file['size'] > $this->max_size){
$this->error = '文件不能超过'.$this->max_size.'字节';
return false;
}
// 新文件名，生成唯一的文件名，并保留原有的文件扩展名
$new_fileName = uniqid($prefix).strrchr($file['name'],'.');
// 确定当前子目录
$sub_path = date('Ymd');
// 确定文件上传全路径
$upload_path = $this->upload_path.$sub_path;
// 判断目录是否存在
if (!is_dir($upload_path)){
mkdir($upload_path);
}
// 移动文件
if (move_uploaded_file($file['tmp_name'],$upload_path.'/'.$new_fileName)){
// succ
return '/upload/'.$sub_path.'/'.$new_fileName;
}else{
$this->error = '上传失败！';
return false;
}
}
public function getError(){
return $this->error;
}
}上传表单
upload.php
<?php
header('content-type:text/html;charset=utf-8');
require './upload.class.php';
$pic_path = '';
if (isset($_FILES['pic'])){
// 设置上传图片参数
$param = array(
'types' => array('image/jpeg','image/jpg','image/png'),
'size' => 600000,
'path' => 'C:/wamp/www/phpProj/upload/'
);
// 实例化函数，传入$param
$upload = new uploadPic($param);
if (!$pic_path = $upload->upload($_FILES['pic'],'pic_')){
echo $upload->getError();
die;
}
}
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>上传图片</title>
</head>
<body>
<h2>图片上传</h2>
<p>
<p>现有图片</p>
<img width="30%" src="<?php echo './'.$pic_path; ?>" onerror="this.src='./upload/default.jpg'"/>
<form action="./upload.php" method="post" enctype="multipart/form-data">
<p>上传图像：<input name="pic" type="file"></p>
<p><input type="submit" value="上传图片"></p>
</form>
</p>
</body>
</html>功能实现前后对比图：
