PHP文件上传类

PHP文件上传类

<?php
namespace system\core;
/**
 * PHP文件上传类
 * @author chenshuo
 * 
 */

class Upload {

	// 允许的类型
	private $allow_type = array();

	// 允许的最大尺寸
	private $max_size;

	// 上传文件的存储路径
	private $path;

	// 源文件名称
	private $orig_name;

	// 源文件大小
	private $orig_size;

	// 源文件后缀名
	private $orig_ext;

	// 源文件的MIME类型
	private $orig_mime_type;

	// 临时文件
	private $tmp_name;

	// 表单字段名称
	private $input_name;

	// 错误列表
	private $msg_error = array();

	// 上传完成后生成的新文件名
	public $filename;

	// 多文件上传返回数组集合
	public $result;


	/**
	 * 构造方法传参
	 * @access public
	 * @param $allow_type  array  允许上传的文件MIME类型
	 * @param $max_size    int    允许上传的最大尺寸
	 * @param $path        string 文件上传后的存储路径
	 * @param $input_name  string  上传文件在表单中的name值
	 * @ $upload = new Upload(array('image/gif','image/png', 'image/jpeg', 'image/pjpeg'), 1024, 'upload/', 'file');
	 * @ $result = $upload->upload();
	 */
	public function __construct($allow_type, $max_size, $path, $input_name) {

		$this->allow_type = $allow_type;
		$this->input_name = $input_name;
		$this->max_size = $max_size;
		$this->path = $path;

		$this->error_msg = array(
			'path_error'   => '[错误]: 确认存在 '.$this->path.' 目录，并已经设置为可写权限',
			'perms_error'   => '[错误]: 指定上传目录没有写权限',
			'empty_error'  => '[错误]: 未选择任何文件',
			'type_error'   => '[错误]: 文件类型不正确',
			'size_error'   => '[错误]: 文件超过规定大小',
			'upload_error' => '[错误]: 由于网络原因导致错误！',
		);
	}

	/**
	 * 文件上传
	 * @access public
	 * @return $$this->result  array  返回二维数组，包括文件编号、上传状态、结果（上传成功返回文件名，失败返回错误信息）
	 */
	public function upload() {
		// 检测上传路径是否存在
		if(file_exists($this->path)) {
			$fileperms = substr(sprintf('%o', fileperms($this->path)), -4);
			if($fileperms != '0777') {
				$this->result[0]['order'] = 0;
				$this->result[0]['status'] = 'faild';
				$this->result[0]['msg'] = $this->error_msg['perms_error'];
				return $this->result;
			} else {
				$this->orig_name = $_FILES[$this->input_name]['name'];
				$this->orig_size = $_FILES[$this->input_name]['size'];
				$this->orig_mime_type = $_FILES[$this->input_name]['type'];
				$this->tmp_name = $_FILES[$this->input_name]['tmp_name'];
				return $this->execute();
			}
			
		} else {
			$this->result[0]['order'] = 0;
			$this->result[0]['status'] = 'faild';
			$this->result[0]['msg'] = $this->error_msg['path_error'];
			return $this->result;
		}
	}

	/**
	 * 执行文件上传
	 * @access private
	 * @return $$this->result  array  返回二维数组，包括文件编号、上传状态、结果（上传成功返回文件名，失败返回错误信息）
	 */
	private function execute() {

		for($i=0; $i<count($this->orig_name); $i++) {
			
			if(empty($this->orig_name[$i])) {
				$this->result[$i]['order'] = $i;
				$this->result[$i]['status'] = 'faild';
				$this->result[$i]['msg'] = $this->error_msg['empty_error'];
			} else {
				if(!in_array($this->orig_mime_type[$i], $this->allow_type)) {
					$this->result[$i]['order'] = $i;
					$this->result[$i]['status'] = 'faild';
					$this->result[$i]['msg'] = $this->error_msg['type_error'];
				} else {
					if(ceil($this->orig_size[$i]/1024) > $this->max_size) {
						$this->result[$i]['order'] = $i;
						$this->result[$i]['status'] = 'faild';
						$this->result[$i]['msg'] = $this->error_msg['size_error'];
					} else {
						$this->orig_ext = strtolower(substr($this->orig_name[$i], strrpos($this->orig_name[$i], '.')+1));
						$this->filename[$i] = date('YmdHis').rand(100,999).".".$this->orig_ext;
						$upload_result = move_uploaded_file($this->tmp_name[$i], $this->path.$this->filename[$i]);
						if($upload_result) {
							$this->result[$i]['order'] = $i;
							$this->result[$i]['status'] = 'success';
							$this->result[$i]['msg'] = $this->filename[$i];
						} else {
							$this->result[$i]['order'] = $i;
							$this->result[$i]['status'] = 'faild';
							$this->result[$i]['msg'] = $this->error_msg['upload_error'];
						}
					}
				}
			}
		}

		return $this->result;

	}


}

?>