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php 登录操作的文件上传管理系统

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Release: 2016-06-13 11:28:11
Original
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本文章来给各位同学介绍一个不错的需要登录的php 文件上传管理系统,功能简单有需要了解的同学可参考。

 代码如下 复制代码

$admin_pw="admin";//管理密码
$uploaddir="upload";//上传目录
session_start();
if($_GET['action']=="getcode")
{
  setcode();
  exit();
}
if($_POST['password']==$admin_pw && $_POST['yz']==$_SESSION['yzcode'])
{
  $_SESSION['logined']=$admin_pw;
}
if($_GET['action']=="logout")
{
  $_SESSION['logined']="";
  header("location: ".$_SERVER['PHP_SELF']);
  exit();
}
if($_SESSION['logined']!=$admin_pw)
{
?>




请登录



输入密码:
验证字符:验证码




}
else
{
?>




文件上传


  if($_POST['ac']=="upload")
  {
 $fileall=explode('.',$_FILES['file']['name']);
 $filetype=$fileall[count($fileall)-1];
 $filename=$uploaddir."/".$_FILES['file']['name']."_".rand(1,999999999).".".$filetype;
 $fileexists=file_exists($filename);
 while($fileexists==true)
 {
  $filename=$uploaddir."/".$_FILES['file']['name']."_".rand(1,999999999).".".$filetype;
  $fileexists=file_exists($filename);
 }
 if(move_uploaded_file($_FILES["file"]["tmp_name"],$filename))
 {
  $url="http://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
  echo "文件:".$filename." 上传成功!
文件地址:测试";
 }
 else
 {
  echo "文件".$filename."上传失败!";
 }
  }
?>

选择文件:

退出登录




}


function setcode()
{
  Header("Content-type: image/gif");
  $border = 0; //是否要边框 1要:0不要
  $how = 4; //验证码位数
  $w = $how*15; //图片宽度
  $h = 20; //图片高度
  $fontsize = 5; //字体大小
  $alpha = "abcdefghijkmnopqrstuvwxyz"; //验证码内容1:字母
  $number = "0123456789"; //验证码内容2:数字
  $randcode = ""; //验证码字符串初始化
  srand((double)microtime()*1000000); //初始化随机数种子
  $im = ImageCreate($w, $h); //创建验证图片
  $bgcolor = ImageColorAllocate($im, 255, 255, 255); //设置背景颜色
  ImageFill($im, 0, 0, $bgcolor); //填充背景色
  if($border)
  {
    $black = ImageColorAllocate($im, 0, 0, 0); //设置边框颜色
    ImageRectangle($im, 0, 0, $w-1, $h-1, $black);//绘制边框
  }
  for($i=0; $i  {  
    $alpha_or_number = mt_rand(0, 1); //字母还是数字
    $str = $alpha_or_number ? $alpha : $number;
    $which = mt_rand(0, strlen($str)-1); //取哪个字符
    $code = substr($str, $which, 1); //取字符
    $j = !$i ? 4 : $j+15; //绘字符位置
    $color3 = ImageColorAllocate($im, mt_rand(0,100), mt_rand(0,100), mt_rand(0,100)); //字符随即颜色
    ImageChar($im, $fontsize, $j, 3, $code, $color3); //绘字符
    $randcode .= $code; //逐位加入验证码字符串
  }
  $_SESSION['yzcode'] = $randcode;
  Imagegif($im);
  ImageDestroy($im);
}
?>


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