Free Programming Source Codes and Computer Programming Tutorials

Sunday, February 21, 2021

Prime Number Checker in PHP

A simple prime number check written using PHP, HTML and CSS I hope you will find my work useful.

I am currently accepting programming work, IT projects, school and application development, programming projects, thesis and capstone projects, IT consulting work, computer tutorials, and web development work kindly contact me at the following email address for further details. If you want to advertise on my website kindly contact me also in my email address also. Thank you.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.

My mobile number here in the Philippines is 09173084360.

My telephone number at home here in Bacolod City, Negros Occidental Philippines is +63 (034) 4335675.

Here in Bacolod City I also accepting computer repair, networking, and Arduino Project development at a very affordable price. My website is www.jakerpomperada.blogspot.com and www.jakerpomperada.com

If you like this video please click the LIKE button, SHARE, and SUBSCRIBE to my channel.

Your support on my channel is highly appreciated.

Thank you very much.

Program Listing

style.css

* {

box-sizing: border-box;

}

body {

font-family: "Calibri", sans-serif;

background: #e2e1e0;

color: #111;

}

main {

position: absolute;

top: 50%;

left: 50%;

transform: translate(-50%, -50%);

}

.container {

padding: 50px;

width: 600px;

background: #fff;

text-align: left;

border-radius: 20px;

box-shadow: 0 0 60px rgba(0,0,0,0.05);

}

h1 {

margin: 0;

line-height: 0.9;

}

h2 {

margin: 0;

}

.title {

display: block;

margin: 0 0 40px;

text-align: center;

}

.txtbox {

display: block;

background: #f1f1f1;

width: 100%;

margin: 0 0 20px 0;

padding: 15px;

border: none;

font-size: 20px;

border-radius: 8px;

font-family: "Calibri", sans-serif;

text-align: center;

}

.txtbox:hover,

.txtbox:focus {

background: #e0e0e0;

}

.btnWrapper {

display: inline-flex;

}

.btn {

background: #673ab7;

color: #fff;

padding: 15px;

width: 250px;

opacity: 0.9;

outline: none;

font-size: 20px;

text-transform: uppercase;

border: none;

text-decoration: none;

text-align: center;

font-family: "Calibri", sans-serif;

cursor: pointer;

text-decoration: none;

display: block;

}

.btn:hover {

opacity: 1;

}

.btnReset {

background: #ff5722;

border-radius: 8px 0 0 8px;

}

.btnConvert {

border-radius: 0 8px 8px 0;

}

.answer {

width: 100%;

padding: 20px;

text-align: center;

font-size: 25px;

font-weight: bold;

background: #9e9e9e;

color: #fff;

line-height: 1;

margin-top: 20px;

border-radius: 8px;

}

index.php

<?php

$out = $input = "";

if ($_POST) {

$input=$_POST['txtNum'];

for ($i = 2; $i <= $input-1; $i++) {

if ($input % $i == 0) {

$value= true;

}

if (empty($value) && $input != 1) {

$out = '<div class="answer">'.$input.' is a Prime Number </div>';

} else {

$out = '<div class="answer">'.$input.' is not a Prime Number</div>';

}

<!DOCTYPE html>

<html lang="en">

<head>

<meta name="viewport" content="width=device-width, initial-scale=1">

<title>Prime Number Checker in PHP</title>

<link rel="stylesheet" href="style.css">

</head>

<body>

<main>

<div class="container">

<div class="title">

<h1>Prime Number Checker in PHP</h1>

<h2>» Jake R. Pomperada, MAED-IT, MIT «</h2>

</div>

<div class="container-wrapper">

<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" class="frmChecker">

<input type="number" class="txtbox" name="txtNum" id="txtNum" value="<?php echo $input; ?>" placeholder="Input a number" required autofocus>

<div class="btnWrapper">

<a href="index.php" class="btn btnReset" name="btnReset">Reset</a>

<button type="submit" class="btn btnConvert" name="btnConvert">Check</button>

</div>

<?php echo $out; ?>

</form>

</div>

</main>

</body>

</html>

Login and Registration in PHP and MySQL

Simple Login and Registration System in PHP and MySQL

A simple login and registration system in PHP and MySQL that I wrote I hope you will find it useful.

My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.

My mobile number here in the Philippines is 09173084360.

My telephone number at home here in Bacolod City, Negros Occidental Philippines is +63 (034) 4335675.

Here in Bacolod City I also accepting computer repair, networking, and Arduino Project development at a very affordable price. My website is www.jakerpomperada.blogspot.com and www.jakerpomperada.com

If you like this video please click the LIKE button, SHARE, and SUBSCRIBE to my channel.

Your support on my channel is highly appreciated.

Thank you very much.

Program Listing

php_login.sql

-- phpMyAdmin SQL Dump

-- version 5.0.2

-- https://www.phpmyadmin.net/

-- Host: 127.0.0.1

-- Generation Time: Feb 21, 2021 at 01:05 PM

-- Server version: 10.4.14-MariaDB

-- PHP Version: 7.4.9

SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";

START TRANSACTION;

SET time_zone = "+00:00";

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;

/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;

/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;

/*!40101 SET NAMES utf8mb4 */;

-- Database: `php_login`

-- --------------------------------------------------------

-- Table structure for table `accounts`

CREATE TABLE `accounts` (

`id` int(11) NOT NULL,

`name` varchar(100) NOT NULL,

`username` varchar(50) NOT NULL,

`password` varchar(50) NOT NULL,

`date_created` datetime NOT NULL DEFAULT current_timestamp()

) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

-- Dumping data for table `accounts`

INSERT INTO `accounts` (`id`, `name`, `username`, `password`, `date_created`) VALUES

(2, 'Jake R. Pomperada', 'jakerpomperada', '21232f297a57a5a743894a0e4a801fc3', '2021-02-21 19:45:30');

-- Indexes for dumped tables

-- Indexes for table `accounts`

ALTER TABLE `accounts`

ADD PRIMARY KEY (`id`);

-- AUTO_INCREMENT for dumped tables

-- AUTO_INCREMENT for table `accounts`

ALTER TABLE `accounts`

MODIFY `id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=4;

COMMIT;

/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;

/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;

/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

style.css

* {

box-sizing: border-box;

}

body {

font-family: "Calibri", sans-serif;

background: #e2e1e0;

color: #111;

overflow: auto;

}

main {

position: absolute;

top: 50%;

left: 50%;

transform: translate(-50%, -50%);

}

.container {

padding: 50px;

width: 500px;

background: #fff;

text-align: left;

border-radius: 20px;

box-shadow: 0 0 60px rgba(0,0,0,0.05);

}

.container.page {

width: 600px;

}

h1 {

margin: 0;

line-height: 1;

}

h3 {

margin: 3px 0 0;

font-size: 1.3em;

}

.title {

display: block;

text-align: center;

}

.title.page {

text-transform: capitalize;

}

.name {

color: #f44336;

}

.txtbox {

display: block;

background: #f1f1f1;

width: 100%;

margin: 0 0 10px;

padding: 15px;

border: none;

font-size: 20px;

border-radius: 8px;

font-family: "Calibri", sans-serif;

text-align: center;

}

.registration .txtbox {

text-align: left;

}

.txtbox:first-of-type {

margin: 30px 0 10px;

}

.txtbox:last-of-type {

margin: 0;

}

.txtbox:hover,

.txtbox:focus {

background: #e0e0e0;

}

.btn {

background: #673ab7;

color: #fff;

padding: 15px;

width: 100%;

opacity: 0.9;

outline: none;

font-size: 20px;

text-transform: uppercase;

border: none;

text-decoration: none;

text-align: center;

font-family: "Calibri", sans-serif;

cursor: pointer;

text-decoration: none;

display: block;

border-radius: 8px;

}

.btn:hover {

opacity: 1;

}

.btnLogout {

margin: 0;

}

.btnRegister {

background: #e91e63;

}

.btnWrapper .btn:first-child {

margin: 20px 0 10px ;

}

.btnWrapper .btn:last-child {

margin: 0;

}

.message {

width: 100%;

padding: 20px;

font-size: 18px;

background: #9e9e9e;

color: #fff;

line-height: 1;

margin-top: 20px;

border-radius: 8px;

word-wrap: break-word;

}

index.php

<?php

$error = "";

if ($_SERVER['REQUEST_METHOD'] == 'POST') {

// Start session

session_start();

// Establish connection to the database

require_once "config.php";

// Rename and sanitize post data

$user = $con->real_escape_string($_POST['txtUser']);

$pass = md5($con->real_escape_string($_POST['txtPass']));

// Check if username and password match any record

if ($stmt = $con->prepare("SELECT `name`, `date_created` FROM `accounts` WHERE `username` = ? AND `password` = ?")) {

$stmt->bind_param("ss", $user, $pass);

$stmt->execute();

$stmt->store_result();

if($stmt->num_rows > 0) {

// If there is a match, store account details in session variables, redirect to page.php, and lastly close connection

$stmt->bind_result($name,$date);

$stmt->fetch();

$_SESSION['name'] = $name;

$_SESSION['date'] = $date;

$stmt->close();

header("Location: page.php");

$con->close();

exit();

} else {

// Show error message if nothing matched

$error = '<div class="message">You have entered an incorrect Username or Password. Please try again.</div>';

}

} else {

// Show error message incase there is something wrong with the sql statement

$error = '<div class="message">Prepare failed: ('.$con->errno.') '.$stmt->error.'</div>';

}

// Close database connection

$con->close();

}

<!DOCTYPE html>

<head>

<title>Simple Login System in PHP</title>

</head>

<body>

<main>

<h1>Simple Login System in PHP</h1>

<h3>» Jake R. Pomperada, MAED-IT, MIT «</h3>

</div>

<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">

<button type="submit" class="btn btnLogin" name="btnLogin">Login</button>

<a href="register.php" class="btn btnRegister" name="btnRegister">Register</a>

</div>

<?php echo $error; ?>

</form>

</div>

</main>

</body>

</html>

config.ini

[database]

hostname = localhost

username = root

password =

dbname = php_login

config.php

<?php

// Read config.ini file

$config = parse_ini_file('config.ini');

// Set database connection

$con = new mysqli($config['hostname'],$config['username'],$config['password'],$config['dbname']);

// if there is a problem, show error message

if (mysqli_connect_errno()) {

printf("Connection failed: %s\n", mysqli_connect_error());

exit();

}

logout.php

<?php

session_start();

$_SESSION = array();

session_destroy();

header("location: index.php");

exit;

<?php

// Start session

session_start();

// Declare variables

$txtName = $txtUser = $name = $user = $msg = $temp = "";

// Check if logged in (if logged in show back button, if not show login button)

if (isset($_SESSION["name"])) {

$button = '<a href="page.php" class="btn btnBack" name="btnBack">Back</a>';

} else {

$button = '<a href="index.php" class="btn btnLogin" name="btnLogin">Login</a>';

}

// Check if form was submitted

if ($_SERVER['REQUEST_METHOD'] == 'POST') {

// Establish connection to the database

require_once "config.php";

// Get and sanitize data

$name = $con->real_escape_string($_POST['txtName']);

$user = $con->real_escape_string($_POST['txtUser']);

$pass = md5($con->real_escape_string($_POST['txtPass']));

$conf = md5($con->real_escape_string($_POST['txtConfirm']));

$checker = 0;

// Check if username is alphanumeric and not less than 4 characters

if (!ctype_alnum($user) || strlen($user)<4) {

$checker = 1;

$temp .= 'Username must be a minimum of 4 alphanumeric characters only.<br><br>';

}

// Check if password is alphanumeric and not less than 4 characters

if (!ctype_alnum($pass) || strlen($pass)<4) {

$checker = 1;

$temp .= 'Password must be a minimum of 4 alphanumeric characters only.<br><br>';

}

// check if password and confirm password matched

if ($pass != $conf) {

$checker = 1;

$temp .= 'Passwords don\'t match.';

}

// Check if errors were found

if($checker == 0) {

// If there were no errors found, execute insert

if ($stmt = $con->prepare("INSERT INTO `accounts`(`name`, `username`, `password`) VALUES (?, ?, ?)")) {

$stmt->bind_param("sss", $name, $user, $pass);

$stmt->execute();

$success = "You are successfully registered.";

$msg = '<div class="message">'.$success.

'</div>';

} else {

$msg = '<div class="message">Prepare failed: ('.$con->errno.') '.$mysqli->error.'</div>';

}

} else {

// If errors were found, show error message, name, and username

$txtName = $name;

$txtUser = $user;

$msg = '<div class="message">'.$temp.'</div>';

}

// Close database connection

$con->close();

}

<!DOCTYPE html>

<head>

<title>Simple Login System in PHP</title>

</head>

<body>

<main>

<h1>Registration Form</h1>

<h3>» Jake R. Pomperada, MAED-IT, MIT «</h3>

</div>

<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" class="frmRegister">

<input type="text" class="txtbox" name="txtName" id="txtName" value="<?php echo $txtName; ?>" placeholder="Full Name" required>

<input type="text" class="txtbox" name="txtUser" id="txtUser" value="<?php echo $txtUser; ?>" placeholder="Username" required>

<button type="submit" class="btn btnRegister" name="btnRegister">Register</button>

<?php echo $button; ?>

</div>

<?php echo $msg; ?>

</form>

</div>

</main>

</body>

</html>

page.php

<?php

// resume existing session

session_start();

// Check if session name exists

if (!isset($_SESSION["name"])) {

header("Location: logout.php");

exit();

}

<!DOCTYPE html>

<head>

<title>Simple Login System in PHP</title>

</head>

<body>

<main>

<h1>Welcome <span class="name"><?php echo $_SESSION["name"]; ?></span>!</h1>

<h2>Date Created: <?php echo date("F j, Y, g:i A", strtotime($_SESSION["date"]));?></h2>

Free Programming Source Codes and Computer Programming Tutorials

Sunday, February 21, 2021

Prime Number Checker in PHP

Login and Registration in PHP and MySQL

Simple Login and Registration System in PHP and MySQL

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