source/include/upload.php

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<?php
class upload_file {
	public $attach = array();
	public $allow_type = array('bmp', 'gif', 'jpg', 'png');
	public $allow_size = 10485760;
	public $error_code = 0;
	
	public function init($attach, $savepath) {
		if (!is_array($attach) || empty($attach) || !$this->is_upload_file($attach['tmp_name']) || trim($attach['name']) == '' || $attach['size'] == 0) {
			$this->attach = array();
			$this->error_code = -101;
			return false;
		} else {
			$attach['name'] = trim($attach['name']);
			$attach['size'] = intval($attach['size']);
			$attach['ext'] = $this->get_ext($attach['name']);
			$attach['path'] = $savepath.$this->make_filename($attach['name']).'.'.$attach['ext'];
			
			$this->attach = & $attach;
			$this->error_code = 0;
		}
	}
	
	public function save_file() {
		if (empty($this->attach) || empty($this->attach['tmp_name']) || empty($this->attach['path'])) {
			$this->error_code = -101;
			return false;
		} elseif ($this->check_filetype($this->attach['ext'])) {
			$this->error_code = -102;
			return false;
		} elseif (!$this->check_filesize($this->attach['size'])) {
			$this->error_code = -103;
			return false;
		} elseif (!$this->save_to_local($this->attach['tmp_name'], $this->attach['path'])) {
			$this->error_code = -104;
			return false;
		} else {
			$this->error_code = 0;
			return true;
		}
	}
	
	public function save_to_local($source, $target) {
		if (!$this->is_upload_file($source)) {
			$succeed = false;
		} elseif (function_exists('move_uploaded_file') && @move_uploaded_file($source, $target)) {
			$succeed = true;
		} elseif (@copy($source, $target)) {
			$succeed = true;
		} elseif (@is_readable($source) && (@$fp_s = fopen($source, 'rb')) && (@$fp_t = fopen($target, 'wb'))) {
			while (!feof($fp_s)) {
				$s_data = @fread($fp_s, @filesize($source));
				@fwrite($fp_t, $s_data);
			}
			fclose($fp_s);
			fclose($fp_t);
			$succeed = true;
		}

		if ($succeed) {