本文给大家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
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<?php
$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 )
{
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >
<html xmlns= " http://www.w3.org/1999/xhtml " >
<head>
<meta http-equiv= "Content-Type" content= "text/html; charset=utf-8" />
<title>请登录</title>
</head>
<body>
<form action= "" method= "post" >
输入密码:<input type= "password" name= "password" style= "width:100px;" /><br />验证字符:<input type= "text" style= "width:40px;" name= "yz" /><a href= "#" onclick= "document.tzm.src='?action=getcode';" ><img src= "?action=getcode" alt= "验证码" id= "tzm" name= "tzm" /></a><br /><input type= "submit" value= "进入管理" />
</form>
</body>
</html>
<?php
}
else
{
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >
<html xmlns= " http://www.w3.org/1999/xhtml " >
<head>
<meta http-equiv= "Content-Type" content= "text/html; charset=utf-8" />
<title>文件上传</title>
</head>
<body>
<?php
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!<br>文件地址:<input type=text style='width:350px;' value=" .dirname( $url ). "/" . $filename . " /><a href=" .dirname( $url ). "/" . $filename . " target=" _blank ">测试</a>" ;
}
else
{
echo "文件" . $filename . "上传失败!" ;
}
}
?>
<form action= "" method= "post" enctype= "multipart/form-data" >
选择文件:<input type= "file" name= "file" id= "file" width= "100px" /><input type= "hidden" name= "ac" value= "upload" /><input type= "submit" value= "上传" />
</form>
<p><a href= "?action=logout" >退出登录</a></p>
</body>
</html>
<?php
}
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 < $how ; $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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以上就和大家一起学习了需要登录的php文件上传管理系统,大家可以根据自己爱好对登录进行美化操作,希望大家可以喜欢这篇文章。