Why are my last two variables not inserting into the database? - php

Question

For some reason my last two variables will not input into the database. I am referring to $verifyKey and $keyExpire. Here is my code with comments. I am adding the entire page to make sure I don't have the wrong character somewhere it isn't supposed to be. Effectively this is a registration page that inserts the information into the database and gives a verification key for email verification later.
I have the fields matched up with the code in the database and they are set to longtext and text. I don't want to insert directly as I am trying to get this method to work with all 5 variables.
<?php
// This is not seen by the end user so this file is placed in the unseen folder
// Check if the user used the sign up button
if (isset($_POST['signup-submit'])) {
// uses the database handler
require 'dbh.php';
$username=$_POST['uid'];
$email=$_POST['mail'];
$password=$_POST['pwd'];
$passwordcnfrm=$_POST['pwd-cnfrm'];
$verifyKey=md5(time().$username);
$keyExpire=date("U")+ 86400;
// Checks to see if any field are empty
if(empty($username)||empty($email)||empty($password)||empty($passwordcnfrm)) {
// This header returns the username and/or email address so the user doesn't have to retype it
header("Location:../signup.php?error=emptyfields&uid=".$username."&mail=".$email);
exit();
}
// Checks if both the user and email are invalid
else if (!filter_var($email, FILTER_VALIDATE_EMAIL)&&!preg_match("/^[a-zA-Z0-9]*$/",$username)) {
header("Location:../signup.php?error=invalidmailuid");
exit();
}
// Checks if the email is valid
else if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
header("Location:../signup.php?error=invalidmail&uid=".$username);
exit();
}
// Checks if the username is valid.
else if (!preg_match("/^[a-zA-Z0-9]*$/",$username)) {
header("Location:../signup.php?error=invaliduid&mail=".$email);
exit();
}
// Checks to see if the password and confirm password match
else if ($password !== $passwordcnfrm){
header("Location:../signup.php?error=passwordcheck&uid=".$username."&mail=".$email);
exit();
}
// Checks to see if the username is already in use or password is invalid
else {
$sql = "SELECT uidUsers FROM users WHERE uidUsers=?";
$stmt = mysqli_stmt_init($conn);
if (!mysqli_stmt_prepare($stmt,$sql)) {
header("Location:../signup.php?error=sqlerror");
exit();
}
else {
mysqli_stmt_bind_param($stmt,"s",$username);
mysqli_stmt_execute($stmt);
mysqli_stmt_store_result($stmt);
$resultCheck = mysqli_stmt_num_rows();
if ($resultCheck < 0){
header("Location:../signup.php?error=usertaken&mail=".$email);
exit();
}
else {
//Inserts into database
$sql = "INSERT INTO users (uidUsers,emailUsers,pwdUsers,verify,expires) VALUES (?,?,?,?,?);";
$stmt = mysqli_stmt_init($conn);
if (!mysqli_stmt_prepare($stmt,$sql)) {
header("Location:../signup.php?error=sqlerror");
exit();
}
else {
$hashedPwd =password_hash($password,PASSWORD_DEFAULT);
mysqli_stmt_bind_param($stmt,"sssss",$username,$email,$hashedPwd,$verifyKey,$keyExpire);
mysqli_stmt_execute($stmt);
header("Location:../signup.php?signup=success");
}
}
}
}
//Closes session to db
mysqli_stmt_close($stmt);
mysqli_close($conn);
}
else {
header("Location:../signup.php");
}

Answer 1

In description of mysqli_stmt::bind_param there is this criptic note:
If data size of a variable exceeds max. allowed packet size
(max_allowed_packet), you have to specify b in types and use
mysqli_stmt_send_long_data() to send the data in packets.
http://php.net/manual/en/mysqli-stmt.bind-param.php
Practically it means that for every longtext (and blob) field you have to additionally call mysqli_stmt_send_long_data after mysqli_stmt_bind_param. Otherwise you have this strange behavious when everything works ok, but fields are not set.