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commented activation.php

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Thies Mueller 2021-01-12 17:33:41 +01:00
parent 998f4331ae
commit 039d1b1f2a
1 changed files with 29 additions and 28 deletions
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57
activation.php
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@ -7,11 +7,11 @@
</head>
<body>
<?php
session_start();
include 'db.inc.php';
session_start(); //session & stuff, you know it
include 'db.inc.php'; //and a db connection, you know it...
function random_string() {
if(function_exists('random_bytes')) {
function random_string() { //first we need a function, lets call it "random_string, shall we?
if(function_exists('random_bytes')) { //then check if other functions exist to create random chars
$bytes = random_bytes(16);
$str = bin2hex($bytes);
} else if(function_exists('openssl_random_pseudo_bytes')) {
@ -20,43 +20,43 @@ function random_string() {
} else if(function_exists('mcrypt_create_iv')) {
$bytes = mcrypt_create_iv(16, MCRYPT_DEV_URANDOM);
$str = bin2hex($bytes);
} else {
} else { //failing to this string:
//this should be a unique string. if we use this in prod we should change this.
$str = md5(uniqid('thisisnotreallyrandombutthisstringheresomakethislongandmaybewith12345numberskthxbye', true));
}
return $str;
return $str; //returning the string generated with one or another method
}
$sessionuser = $_SESSION['username'];
$showForm = true;
$sessionuser = $_SESSION['username']; //get the usernamne from the session
$showForm = true; //print the "form" (in this case just a button)
if(isset($_GET['send']) ) {
if(!isset($sessionuser) || empty($sessionuser)) {
if(isset($_GET['send']) ) { //you know the drill. if theres a "?=send=1" this little script comes to action
if(!isset($sessionuser) || empty($sessionuser)) { //checks if you've got a valid session if not, it prints it out.
$error = '<span class="badge badge-pill badge-danger"><b>No Valid User in Session. Please Login Again!</b></span>';
} else {
$statement = $pdo->prepare("SELECT * FROM users WHERE username = :username");
} else { //if theres a valid session do this:
$statement = $pdo->prepare("SELECT * FROM users WHERE username = :username"); //sql statement username = $sessionuser
$result = $statement->execute(array('username' => $sessionuser));
$user = $statement->fetch();
if($user === false) {
if($user === false) { //in some cases users have a valid session, but the account was deleted in the background, this has that case covered:
$error = '<span class="badge badge-pill badge-warning"><b>no user found</b></span>';
}
if($user['username'] == ""){
if($user['username'] == ""){ //if you've managed to create a user without username, print an error.
$error = '<span class="badge badge-pill badge-warning"><b>no user found</b></span>';
}
if($user['activated'] == "1"){
if($user['activated'] == "1"){ //if your account is already activated:
$error = '<span class="badge badge-pill badge-warning"><b>user already activated!</b></span>';
} else {
//check if theres a code already
$activationcode = random_string();
$statement = $pdo->prepare("UPDATE users SET activationcode = :activationcode, activationcode_time = NOW() WHERE id = :userid");
$result = $statement->execute(array('activationcode' => sha1($activationcode), 'userid' => $user['id']));
$mailrcpt = $user['email'];
$mailsubject = "Activate the Account of ".$user['username'];
$from = "From: Account Activation Service <activatemyaccount@".$_SERVER['HTTP_HOST'].">"; //place a real address if we use this in production
$url_activationcode = 'https://'.$_SERVER['HTTP_HOST'].'/activate.php?userid='.$user['id'].'&code='.$activationcode; //this shouldnt be my domain in prod..
$text = 'Hallo '.$user['username'].',
$activationcode = random_string(); //store a random string in this variable
$statement = $pdo->prepare("UPDATE users SET activationcode = :activationcode, activationcode_time = NOW() WHERE id = :userid"); //prepare the statement
$result = $statement->execute(array('activationcode' => sha1($activationcode), 'userid' => $user['id'])); //activationcode in db is sha1 of real activationcode
//now lets compose a mail:
$mailrcpt = $user['email']; //mail goes to user that should be validated.
$mailsubject = "Activate the Account of ".$user['username']; //the subject
$from = "From: Account Activation Service <activatemyaccount@".$_SERVER['HTTP_HOST'].">"; //send mail from "activatemyaccount@%urlyourusingtoaccessthisscript%"
$url_activationcode = 'https://'.$_SERVER['HTTP_HOST'].'/activate.php?userid='.$user['id'].'&code='.$activationcode; //url for activation is https://%urlyourusingtoaccessthisscript%/activate.php?userid=$userid&code=$activationcode
//thats the content of the mail:
$text = 'Hallo '.$user['username'].',
please use the following URL to activate your account in the next 24h:
'.$url_activationcode.'
@ -64,15 +64,16 @@ If this mail comes unsolicited, please just ignore the mail.
cheers
loginpagefoo script';
mail($mailrcpt, $mailsubject, $text, $from);
mail($mailrcpt, $mailsubject, $text, $from); //sending the mail with the build-in mail function.
echo 'Link send. Going back to <a href="profile.php">profile</a> page. <meta http-equiv="refresh" content="0; URL=profile.php">';
//afterwards going back to profile, and dont render the form again.
$showForm = false;
}
}
}
if($showForm):
if($showForm): //you guessed it: html & the form:
?>
<h1>Activate user</h1>
@ -88,5 +89,5 @@ if(isset($error) && !empty($error)) {
</form>
<?php
endif;
endif; //thats all
?>