PHP file upload management system for login operation_PHP tutorial

This article will introduce to you a good PHP file upload management system that requires login. The function is simple and students who need to know more can refer to it.

The code is as follows

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$admin_pw="admin";// Management password $uploaddir="upload";//Upload directory session_start(); if($_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) { ?> < ;body> Enter password: Verification characters: } else { ?> 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'].$_SERVER['REQUEST_URI']; echo "File:".$filename." Uploaded successfully! File address:Test"; } else { echo "File".$filename ."Upload failed! "; } } ?> Select file:< input type="file" name="file" id="file" width="100px" /> Log out } function setcode() { Header("Content-type: image/gif"); $border = 0; //Whether you want border 1 Yes: 0 No $how = 4; //Verification code digits $w = $how*15; //Picture width $h = 20; //Picture height $fontsize = 5; //Font Size $alpha = "abcdefghijkmnopqrstuvwxyz"; //Verification code content 1: Letters $number = "0123456789"; //Verification code content 2: Numbers $randcode = ""; //Verification code String initialization srand((double)microtime()*1000000); //Initialize random number seed $im = ImageCreate($w, $h); //Create verification image $bgcolor = ImageColorAllocate($im, 255, 255, 255); //Set the background color ImageFill($im, 0, 0, $bgcolor); //Fill the background color if($border) { $black = ImageColorAllocate($im, 0, 0, 0); //Set the border color ImageRectangle($im, 0, 0, $w-1, $h-1, $black);/ /Draw border } for($i=0; $i<$how; $i++) { $alpha_or_number = mt_rand(0, 1); //Letters or numbers $str = $alpha_or_number ? $alpha : $number; $which = mt_rand(0, strlen($str)-1); //Which character to take $code = substr($str, $which , 1); //Get character $j = !$i ? 4 : $j+15; //Draw character position $color3 = ImageColorAllocate($im, mt_rand(0,100), mt_rand(0,100) , mt_rand(0,100)); //Character random color ImageChar($im, $fontsize, $j, 3, $code, $color3); //Draw character $randcode .= $code; / /Add the verification code string bit by bit } $_SESSION['yzcode'] = $randcode; Imagegif($im); ImageDestroy($im); } ?>

http://www.bkjia.com/PHPjc/444593.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/444593.htmlTechArticleThis article will introduce to you a good PHP file upload management system that requires login. It has simple functions and needs to be understood. Students can refer to it. The code is as follows Copy the code ?php $admin_...