用了一點時間，寫了一個php上傳圖片的類，功能不太全與大家共同學習給大家分享一下，希望可以給你帶來幫助.......
以下代碼命名問：upload_image.class.php
<?php
class upload_image {
var $upload_file_name;//上傳文件的名字
var $upload_file_size;//上傳文件的大小
var $upload_max_size = 50000;//上傳文件限制的大小
var $upload__file_dir = "uploadfile/";//圖片存放路徑
var $upload_tamp_dir;//上傳文件的臨時路徑
var $upload_file_type;//上傳文件的類別
var $upload_allow_type = array("image/jpeg","image/jpg","image/png","image/gif");//允許上傳文件的類別
var $errorstr;//錯誤提示
//獲取上傳文件的名字
function get_upload_name($upload_file_name){
$type = end(explode('.',$upload_file_name));//獲取圖片的類型，然後重命名
return $this->upload_file_name=$this->upload__file_dir.md5(date("ymdhis")).'.'.$type;
}
//獲取上傳文件的類型
function get_upload_type($upload_file_type){
return $this->upload_file_type = $upload_file_type;
}
//獲取文件的大小
function get_upload_size($upload_file_size){
return $this ->upload_file_size = $upload_file_size;
}
//獲取文件的臨時目錄
function get_upload_tamp($upload_tamp_dir){
return $this->upload_tamp_dir = $upload_tamp_dir;
}
//檢查文件存放目錄
function check_upload_dir(){
if(!file_exists($this ->upload__file_dir)){
mkdir($this->upload__file_dir);
}
}
//檢查上傳文件的大小
function check_upload_size(){
if($this ->upload_file_size > $this->upload_max_size){
$this->halt("上傳的文件太大");
exit;
}
}
//檢查上傳文件的類型
function check_upload_type(){
if(!in_array($this->upload_file_type,$this->upload_allow_type)){
$this->halt("上傳的文件類型錯誤");
exit;
}
}
//移動圖片
function uplod_image() {
if(!move_uploaded_file($this->upload_tamp_dir,$this->upload_file_name)){
$this->halt("上傳文件失敗");
exit;
}else{
$this->halt("上傳成功");
}
}
//錯誤提醒
function halt($errorstr){
echo '<script>alert("'.$errorstr.'");history.go(-1);</script>';
}
//上傳操作
function upload(){
$this->check_upload_type();
$this->check_upload_size();
$this->check_upload_dir();
$this->uplod_image();
}
}
?>
測試一下，測試代碼爲：test.php
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>圖片上傳測試</title>
</head>
<body>
<?
if($_POST['submit']){
include("upload_image.class.php");
$image = new upload_image();
$image->get_upload_name($_FILES['file']['name']);
$image->get_upload_size($_FILES['file']['size']);
$image->get_upload_type($_FILES['file']['type']);
$image->get_upload_tamp($_FILES['file']['tmp_name']);
$image->upload();
}
?>
<form action="" method="post" enctype="multipart/form-data">
<table align="center">
圖片來源：<input type="file" name="file">
<input type="hidden" name="hidden" value="a">
<input type="submit" name="submit" value="上傳">
</table>
</form>
</body>
</html>