php登录操作的文件上传管理系统
<?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://HdhCmsTestw3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > <html xmlns= "http://HdhCmsTestw3.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://HdhCmsTestw3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > <html xmlns= "http://HdhCmsTestw3.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 } //开源代码phpfensi测试数据 $_SESSION [ 'yzcode' ] = $randcode ; Imagegif( $im ); ImageDestroy( $im ); } ?>查看更多关于php登录操作的文件上传管理系统 - php上传下载的详细内容...
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