本文給大家介紹一個不錯的需要登錄的php 文件上傳管理系統(tǒng)，功能簡單有需要了解的同學可參考。
代碼如下
<?php$admin_pw="admin";//管理密碼$uploaddir="upload";//上傳目錄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>請登錄</title></head><body><form action="" method="post">輸入密碼：<input type="password" name="password" /><br />驗證字符：<input type="text" name="yz" /><a href="#" onclick="document.tzm.src='?action=getcode';"><img src="?action=getcode" alt="驗證碼" name="tzm" /></a><br /><input type="submit" value="進入管理" /></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>文件上傳</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." 上傳成功！<br>文件地址：<input type=text value=".dirname($url)."/".$filename." /><a href=".dirname($url)."/".$filename." target="_blank">測試</a>"; } else { echo "文件".$filename."上傳失敗！"; } }?><form action="" method="post" enctype="multipart/form-data">選擇文件：<input type="file" name="file" width="100px" /><input type="hidden" name="ac" value="upload" /><input type="submit" value="上傳" /></form><p><a href="?action=logout">退出登錄</a></p></body></html><?php}function setcode(){ Header("Content-type: image/gif"); $border = 0; //是否要邊框 1要:0不要 $how = 4; //驗證碼位數(shù) $w = $how*15; //圖片寬度 $h = 20; //圖片高度 $fontsize = 5; //字體大小 $alpha = "abcdefghijkmnopqrstuvwxyz"; //驗證碼內(nèi)容1:字母 $number = "0123456789"; //驗證碼內(nèi)容2:數(shù)字 $randcode = ""; //驗證碼字符串初始化 srand((double)microtime()*1000000); //初始化隨機數(shù)種子 $im = ImageCreate($w, $h); //創(chuàng)建驗證圖片 $bgcolor = ImageColorAllocate($im, 255, 255, 255); //設置背景顏色 ImageFill($im, 0, 0, $bgcolor); //填充背景色 if($border) { $black = ImageColorAllocate($im, 0, 0, 0); //設置邊框顏色 ImageRectangle($im, 0, 0, $w-1, $h-1, $black);//繪制邊框 } for($i=0; $i<$how; $i++) { $alpha_or_number = mt_rand(0, 1); //字母還是數(shù)字 $str = $alpha_or_number ? $alpha : $number; $which = mt_rand(0, strlen($str)-1); //取哪個字符 $code = substr($str, $which, 1); //取字符 $j = !$i ? 4 : $j+15; //繪字符位置 $color3 = ImageColorAllocate($im, mt_rand(0,100), mt_rand(0,100), mt_rand(0,100)); //字符隨即顏色 ImageChar($im, $fontsize, $j, 3, $code, $color3); //繪字符 $randcode .= $code; //逐位加入驗證碼字符串 } $_SESSION['yzcode'] = $randcode; Imagegif($im); ImageDestroy($im);}?>
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