How to Submit Registration and Login Form in PHP

How to Submit Registration and Login Form in PHP?

Hi friends, today we will learn How to Submit Registration and Login Form in PHP
so let's start

Note - follow the steps.

Step 1 -  First we will create a Registration form and write code for this.
create a PHP file in your folder  registartion.php. I am not using CSS here. just use simple HTML you can use accordingly to you. 
<?php

 require('config.php');

 if(isset($_POST['submit'])){
 
 if($_POST['username'] !== "" && $_POST['email'] !== "" && $_POST['password'] !=="" && $_POST['cPassword'] !== "" ){
 // if you want to check all fields are required.
 
 if($_POST['password'] !== $_POST['cPassword']){ //check password and confirm password
 $pwd_nomatch = "password not match";
 }else{
 // we don't need to store confirm password in DB
 // make sure you should include connection file on the top ex -> require('config.php');
 $query = "INSERT INTO `register` (username, password,email) VALUES ('".$_POST['username']."', '".$_POST['cPassword']."', '".$_POST['email']."')";
 $result = mysql_query($query);
 if($result){
 $success_msg = "User Created Successfully.";
 }
 }
 }else{
 // Error
 $allerror = "All field are requried";
 }

 // or if you want to do separate condition

 if($_POST['username'] !== ""){
 $username = mysql_real_escape_string(trim($_POST['username']));
 }else{
 $user_error = "User Name is required";
 }

 if($_POST['email'] !== ""){
 $email = mysql_real_escape_string(trim($_POST['email']));
 }else{
 $email_error = "Email Id is required";
 }

 if($_POST['password'] !== ""){
 $pwd = mysql_real_escape_string($_POST['password']);
 }else{
 $pwd_error = "Password required";
 }

 if($_POST['cPassword'] !== ""){
 $cPassword = mysql_real_escape_string($_POST['cPassword']);
 }else{
 $cPassword_error = "Confirm Password required";
 }


 if($_POST['cPassword'] == $_POST['userpassword']){
 // make sure you should include connection file on the top ex -> require('config.php');


 $check_user_exists = "select * from `user` where email ='".$_POST['email']."' ";
 $result = mysql_query($connection,$check_user_exists);
 $num_rows = mysql_num_rows($result); 
        
if($num_rows > 0){ // check if user exists already or not
 // we don't need to store confirm password in DB
 $query = "INSERT INTO `register` (username, password, email) VALUES ('$username', '$pwd', '$email')";
 $result = mysql_query($query);
 if($result){
 $success_msg = "User Created Successfully.";
 }

}else{
   $user_exists = "User already exists";
}

 }else{
 $pwd_nomatch = "password not match";
 }
}

 ?>
// File name - registartion.php
<center><h1>Regisartion Form</h1></center>
<form action="registarion.php" method="post">
<?php if(isset($success_msg)){?>
 <b> <?php echo $success_msg ;?> </b>
<?php } ?>

<input type = "text" name="username" value="">
<?php if(isset($user_error)){?>
 <span> <?php echo $user_error ;?> </span>
 <?php } ?>

<input type = "email" name="email" value="">
<?php if(isset($email_error)){?>
 <span> <?php echo $email_error ;?> </span>
 <?php } ?>

<input type = "password" name="password" value="">
<?php if(isset($pwd_error)){?>
 <span> <?php echo $pwd_error ;?> </span>
 <?php } ?>

<input type = "password" name="cpassword" value="">
 <?php if(isset($cPassword_error)){?>
 <span> <?php echo $cPassword_error ;?> </span>
 <?php } ?>

<?php if(isset($pwd_nomatch)){?>
 <span> <?php echo $pwd_nomatch ;?> </span>
 <?php } ?>

<input type = "submit" name="submit" value="submit">
 <?php if(isset($allerror)){?>
 <span> <?php echo $allerror ;?> </span>
 <?php } ?>

<?php if(isset($user_exists)){?>
 <span> <?php echo $user_exists ;?> </span>
 <?php } ?>

</form>
Step 2 - Now you have completed Successfully Registration form and wrote PHP code with validations.
Now we will create login Form using simple HTML and learn How we will match the credentials for login using PHP 
create login.php file in your folder and include your connection file.
<?php
 // login.php

 require('config.php');

 if(isset($_POST['submit'])){
 if($_POST['email'] !== "" && $_POST['password'] !==""){

 // make sure you should include connection file on the top ex -> require('config.php');
 $query = "select * from `user` where `email` = '".mysql_real_escape_string($_POST['email'])."' and `password` = '".mysql_real_escape_string($_POST['password'])."' ";
 $result = mysql_query($connection,$query);

 if(mysqli_num_rows($result) > 0){
 $success_msg = "You are Successfully login.";
 header('Location: index.php');
         }else{
 $error_msg = "email id or password not match";
 }

 }else{
 // Error
 $allerror = "All field are requried";
 }

}

 ?>

File name - login.php

<center><h1>Login Form</h1></center>
<form action="login.php" method="post">

<?php if(isset($success_msg)){?>
 <b> <?php echo $success_msg ;?> </b>
<?php } ?>

<input type = "email" name="email" value="">
<?php if(isset($email_error)){?>
 <span> <?php echo $email_error ;?> </span>
 <?php } ?>
<input type = "password" name="password" value="">
<?php if(isset($pwd_error)){?>
 <span> <?php echo $pwd_error ;?> </span>
 <?php } ?>
<input type = "submit" name="submit" value="Login">

 <?php if(isset($allerror)){?>
 <span> <?php echo $allerror ;?> </span>
 <?php } ?>

<?php if(isset($error_msg)){?>
 <span> <?php echo $error_msg ;?> </span>
 <?php } ?>

</form>

Yeah! You have learned ЁЯШК
I hope you understood this and like this article. if you like it so, please give feedback in the comment section.

If any mistakes I made here, so please let me know and improve me.
If you have any query, feel free to ask me  ЁЯШК 
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