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Forgot Account Password Form Email Script Ajax Tutorial

Learn to program an Ajax PHP MySQL Forgot Password script set for the users of your social networking website who happen to forget their password. This logic generates a temporary password for the user. Later on in their account editing options you will want to allow the user to change their password to something they desire as often as they like. <?php include_once("php_includes/check_login_status.php"); // If user is already logged in, header that weenis away if($user_ok == true){ header("location: user.php?u=".$_SESSION["username"]); exit(); } ?><?php // AJAX CALLS THIS CODE TO EXECUTE if(isset($_POST["e"])){ $e = mysqli_real_escape_string($db_conx, $_POST['e']); $sql = "SELECT id, username FROM users WHERE email='$e' AND activated='1' LIMIT 1"; $query = mysqli_query($db_conx, $sql); $numrows = mysqli_num_rows($query); if($numrows > 0){ while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)){ $id = $row["id"]; $u = $row["username"]; } $emailcut = substr($e, 0, 4); $randNum = rand(10000,99999); $tempPass = "$emailcut$randNum"; $hashTempPass = md5($tempPass); $sql = "UPDATE useroptions SET temp_pass='$hashTempPass' WHERE username='$u' LIMIT 1"; $query = mysqli_query($db_conx, $sql); $to = "$e"; $from = "auto_responder@yoursite.com"; $headers ="From: $from\n"; $headers .= "MIME-Version: 1.0\n"; $headers .= "Content-type: text/html; charset=iso-8859-1 \n"; $subject ="yoursite Temporary Password"; $msg = '<h2>Hello '.$u.'</h2><p>This is an automated message from yoursite. If you did not recently initiate the Forgot Password process, please disregard this email.</p><p>You indicated that you forgot your login password. We can generate a temporary password for you to log in with, then once logged in you can change your password to anything you like.</p><p>After you click the link below your password to login will be:<br /><b>'.$tempPass.'</b></p><p><a href="http://www.yoursite.com/forgot_pass.php?u='.$u.'&p='.$hashTempPass.'">Click here now to apply the temporary password shown below to your account</a></p><p>If you do not click the link in this email, no changes will be made to your account. In order to set your login password to the temporary password you must click the link above.</p>'; if(mail($to,$subject,$msg,$headers)) { echo "success"; exit(); } else { echo "email_send_failed"; exit(); } } else { echo "no_exist"; } exit(); } ?><?php // EMAIL LINK CLICK CALLS THIS CODE TO EXECUTE if(isset($_GET['u']) && isset($_GET['p'])){ $u = preg_replace('#[^a-z0-9]#i', '', $_GET['u']); $temppasshash = preg_replace('#[^a-z0-9]#i', '', $_GET['p']); if(strlen($temppasshash) < 10){ exit(); } $sql = "SELECT id FROM useroptions WHERE username='$u' AND temp_pass='$temppasshash' LIMIT 1"; $query = mysqli_query($db_conx, $sql); $numrows = mysqli_num_rows($query); if($numrows == 0){ header("location: message.php?msg=There is no match for that username with that temporary password in the system. We cannot proceed."); exit(); } else { $row = mysqli_fetch_row($query); $id = $row[0]; $sql = "UPDATE users SET password='$temppasshash' WHERE id='$id' AND username='$u' LIMIT 1"; $query = mysqli_query($db_conx, $sql); $sql = "UPDATE useroptions SET temp_pass='' WHERE username='$u' LIMIT 1"; $query = mysqli_query($db_conx, $sql); header("location: login.php"); exit(); } } ?> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Forgot Password</title> <link rel="icon" href="favicon.ico" type="image/x-icon"> <link rel="stylesheet" href="style/style.css"> <style type="text/css"> #forgotpassform{ margin-top:24px; } #forgotpassform > div { margin-top: 12px; } #forgotpassform > input { width: 250px; padding: 3px; background: #F3F9DD; } #forgotpassbtn { font-size:15px; padding: 10px; } </style> <script src="js/main.js"></script> <script src="js/ajax.js"></script> <script> function forgotpass(){ var e = _("email").value; if(e == ""){ _("status").innerHTML = "Type in your email address"; } else { _("forgotpassbtn").style.display = "none"; _("status").innerHTML = 'please wait ...'; var ajax = ajaxObj("POST", "forgot_pass.php"); ajax.onreadystatechange = function() { if(ajaxReturn(ajax) == true) { var response = ajax.responseText; if(response == "success"){ _("forgotpassform").innerHTML = '<h3>Step 2. Check your email inbox in a few minutes</h3><p>You can close this window or tab if you like.</p>'; } else if (response == "no_exist"){ _("status").innerHTML = "Sorry that email address is not in our system"; } else if(response == "email_send_failed"){ _("status").innerHTML = "Mail function failed to execute"; } else { _("status").innerHTML = "An unknown error occurred"; } } } ajax.send("e="+e); } } </script> </head> <body> <?php include_once("template_pageTop.php"); ?> <div id="pageMiddle"> <h3>Generate a temorary log in password</h3> <form id="forgotpassform" onsubmit="return false;"> <div>Step 1: Enter Your Email Address</div> <input id="email" type="text" onfocus="_('status').innerHTML='';" maxlength="88"> <br /><br /> <button id="forgotpassbtn" onclick="forgotpass()">Generate Temporary Log In Password</button> <p id="status"></p> </form> </div> <?php include_once("template_pageBottom.php"); ?> </body> </html>
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