用了一点时间，写了一个php上传图片的类，功能不太全与大家共同学习给大家分享一下，希望可以给你带来帮助.......
以下代码命名问：upload_p_w_picpath.class.php
<?php
class upload_p_w_picpath {
var $upload_file_name;//上传文件的名字
var $upload_file_size;//上传文件的大小
var $upload_max_size = 50000;//上传文件限制的大小
var $upload__file_dir = "uploadfile/";//图片存放路径
var $upload_tamp_dir;//上传文件的临时路径
var $upload_file_type;//上传文件的类别
var $upload_allow_type = array("p_w_picpath/jpeg","p_w_picpath/jpg","p_w_picpath/png","p_w_picpath/gif");//允许上传文件的类别
var $errorstr;//错误提示
//获取上传文件的名字
function get_upload_name($upload_file_name){
$type = end(explode('.',$upload_file_name));//获取图片的类型，然后重命名
return $this->upload_file_name=$this->upload__file_dir.md5(date("ymdhis")).'.'.$type;
}
//获取上传文件的类型
function get_upload_type($upload_file_type){
return $this->upload_file_type = $upload_file_type;
}
//获取文件的大小
function get_upload_size($upload_file_size){
return $this ->upload_file_size = $upload_file_size;
}
//获取文件的临时目录
function get_upload_tamp($upload_tamp_dir){
return $this->upload_tamp_dir = $upload_tamp_dir;
}
//检查文件存放目录
function check_upload_dir(){
if(!file_exists($this ->upload__file_dir)){
mkdir($this->upload__file_dir);
}
}
//检查上传文件的大小
function check_upload_size(){
if($this ->upload_file_size > $this->upload_max_size){
$this->halt("上传的文件太大");
exit;
}
}
//检查上传文件的类型
function check_upload_type(){
if(!in_array($this->upload_file_type,$this->upload_allow_type)){
$this->halt("上传的文件类型错误");
exit;
}
}
//移动图片
function uplod_p_w_picpath() {
if(!move_uploaded_file($this->upload_tamp_dir,$this->upload_file_name)){
$this->halt("上传文件失败");
exit;
}else{
$this->halt("上传成功");
}
}
//错误提醒
function halt($errorstr){
echo '<script>alert("'.$errorstr.'");history.go(-1);</script>';
}
//上传操作
function upload(){
$this->check_upload_type();
$this->check_upload_size();
$this->check_upload_dir();
$this->uplod_p_w_picpath();
}
}
?>
测试一下，测试代码为：test.php
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>图片上传测试</title>
</head>
<body>
<?
if($_POST['submit']){
include("upload_p_w_picpath.class.php");
$p_w_picpath = new upload_p_w_picpath();
$p_w_picpath->get_upload_name($_FILES['file']['name']);
$p_w_picpath->get_upload_size($_FILES['file']['size']);
$p_w_picpath->get_upload_type($_FILES['file']['type']);
$p_w_picpath->get_upload_tamp($_FILES['file']['tmp_name']);
$p_w_picpath->upload();
}
?>
<form action="" method="post" enctype="multipart/form-data">
<table align="center">
图片来源：<input type="file" name="file">
<input type="hidden" name="hidden" value="a">
<input type="submit" name="submit" value="上传">
</table>
</form>
</body>
</html>
