Form Validation Example by PHP 8 MySQL

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Hello Brother, I will let you know lesson of PHP 8 MySQL Form Validation Example. you will learn PHP 8 Server Side Form Validation Tutorial Example. step by step explain how to create form validation in php 8. We will look at lesson of PHP 8 MySQL form input validation lesson. follow bellow step for how to show validation error in PHP 8 MySQL.

This article will give you simple lesson of PHP 8 Basic Form Validation Tutorial

So, let's see bellow solution:

index.php

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

<title>Validation</title>

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css" integrity="sha384-B0vP5xmATw1+K9KRQjQERJvTumQW0nPEzvF6L/Z6nronJ3oUOFUFpCjEUQouq2+l" crossorigin="anonymous">

</head>

<body>

<?php

$con = mysqli_connect("localhost","root","","form_validations");

$errors = array();

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

if(preg_match("/\S+/", $_POST['fname']) === 0){

$errors['fname'] = "* First Name is required.";

}

if(preg_match("/\S+/", $_POST['description']) === 0){

$errors['description'] = "* Message filed is required.";

}

if(preg_match("/.+@.+\..+/", $_POST['email']) === 0){

$errors['email'] = "* Not a valid e-mail address.";

}

if(preg_match("/.{8,}/", $_POST['password']) === 0){

$errors['password'] = "* Password Must Contain at least 8 Chanacters.";

}

if(strcmp($_POST['password'], $_POST['confirm_password'])){

$errors['confirm_password'] = "* Password do not much.";

}

if(count($errors) === 0){

$fname = mysqli_real_escape_string($con, $_POST['fname']);

$description = mysqli_real_escape_string($con, $_POST['description']);

$email = mysqli_real_escape_string($con, $_POST['email']);

$password = hash('sha256', $_POST['password']);

function createSalt(){

$string = md5(uniqid(rand(), true));

return substr($string, 0, 3);

}

$salt = createSalt();

$password = hash('sha256', $salt . $password);

$search_query = mysqli_query($con, "SELECT * FROM members WHERE email = '$email'");

$num_row = mysqli_num_rows($search_query);

if($num_row >= 1){

$errors['email'] = "Email address is unavailable.";

}else{

$sql = "INSERT INTO members(`fname`, `description`, `email`, `salt`, `password`) VALUES ('$fname', '$description', '$email', '$salt', '$password')";

$query = mysqli_query($con, $sql);

$_POST['fname'] = '';

$_POST['description'] = '';

$_POST['email'] = '';

$successful = "<h4 class='alert alert-success'> You are successfully registered.</h4>";

}

}

}

?>

<div class="container mt-5">

<div class="row">

<div class="col-md-12 ">

<div class="card w-75 m-auto">

<div class="card-header text-center bg-dark text-white">

<h3>PHP MySQL Form Validation Lesson - Mywebtuts.com</h3>

</div>

<div class="card-body">

<form method="post" action="">

<?php if(isset($successful)){ echo $successful; } ?>

<div class="row">

<div class="col-md-6">

<div class="form-group">

<label for="fname"><strong>First Name :<span class="text-danger">*</span></strong></label>

<input type="text" class="form-control" name="fname" id="fname" placeholder="First Name" value="<?php if(isset($_POST['fname'])){echo $_POST['fname'];} ?>">

<?php if(isset($errors['fname'])){echo "<span class='text-danger'>" .$errors['fname']. "</span>"; } ?>

</div>

</div>

<div class="col-md-6">

<div class="form-group">

<label for="email"><strong>Email :<span class="text-danger">*</span></strong></label>

<input type="text" class="form-control" name="email" id="email" placeholder="E-mail Address" value="<?php if(isset($_POST['email'])){echo $_POST['email'];} ?>">

<?php if(isset($errors['email'])){echo "<span class='text-danger'>" .$errors['email']. "</span>"; } ?>

</div>

</div>

<div class="col-md-6">

<div class="form-group">

<label for="pw"><strong>Password :<span class="text-danger">*</span></strong></label>

<input type="password" class="form-control" name="password" id="pw" placeholder="Password">

<?php if(isset($errors['password'])){echo "<span class='text-danger'>" .$errors['password']. "</span>"; } ?>

</div>

</div>

<div class="col-md-6">

<div class="form-group">

<label for="cpw"><strong>Confirm Password :<span class="text-danger">*</span></strong></label>

<input type="password" class="form-control" name="confirm_password" id="cpw" placeholder="Confirm Password">

<?php if(isset($errors['confirm_password'])){echo "<span class='text-danger'>" .$errors['confirm_password']. "</span>"; } ?>

</div>

</div>

<div class="col-md-12 ">

<div class="form-group">

<label for="description"><strong>Message :<span class="text-danger">*</span></strong></label>

<textarea type="text" rows="5" class="form-control" name="description" id="description" placeholder="Message"></textarea>

<?php if(isset($errors['description'])){echo "<span class='text-danger'>" .$errors['description']. "</span>"; } ?>

</div>

</div>

</div>

<div class="form-group d-flex justify-content-center">

<input type="submit" name="submit" class="btn btn-success" value="Submit">

</div>

</form>

</div>

</div>

</div>

</div>

</div>

</body>

</html>

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