php常用文件上传类-PHP源码

php常用文件上传类

/**
* flie class
* (jpg,gif,png)
*/
class Upload {
var $_file;
var $_fileType;
var $target = 'upload/';

/**
* construct for this class
*
* @param string $name
* @return Upload
*/
function Upload($name) {
if(isset($_FILES[$name])) {
$this->_file = &$_FILES[$name];
$this->_parseUploadFile();
} else {
die('No file upload.');
}
}

/**
* set upload target path
*
* @param string $path
* @return boolean
*/
function setTarget($path = 'upload/') {
if(is_dir($path)) {
$this->target = rtrim($path,'/').'/';
return true;
} else {
return false;
}
}

/**
* get the type of the file
*
*/
function _parseUploadFile() {
$type = $this->_file['type'];
if(isset($type) && $type != '') {
switch ($type) {
case 'image/gif':
$this->_fileType = 'gif';
break;
case 'image/png':
$this->_fileType = 'png';
break;
case 'image/jpeg':
$this->_fileType = 'jpg';
break;
case 'image/pjpeg':
$this->_fileType = 'jpg';
break;
default:
$this->_fileType = 'unknow';
break;
}
} else {
$filename = $this->_file['name'];
$filename = explode('.',$filename);
$filename = strtoupper($filename[sizeof($filename) - 1]);
switch ($filename) {
case 'PNG':
$this->_fileType = 'png';
break;
case 'JPEG':
$this->_fileType = 'jpg';
break;
case 'JPG':
$this->_fileType = 'jpg';
break;
case 'GIF':
$this->_fileType = 'gif';
break;
default:
$this->_fileType = 'unknow';
break;
}
unset($filename);
}
unset($type);
}

/**
* upload file
*
* @return array
*/
function load() {
if($this->_fileType == 'unknow') {
die('Can not upload this file,because the type is not allow.');
}
if(file_exists($this->_file['tmp_name']) && is_uploaded_file($this->_file['tmp_name'])) {
$new_file_name = $this->target.time().'.'.$this->_fileType;
move_uploaded_file($this->_file['tmp_name'],$new_file_name);

return array('name'=>$new_file_name,'size'=>$this->_file['size'],'type'=>$this->_fileType);
} else {
return false;
}
}
}
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