WordPress is one of the most widely use Blog Engine today and many web developers are using WordPress
as CMS to build Blog, Personal and Business site, on past few days, I was working on a WordPress
site that needs Custom Login page functionality, you may see a lot of plugins out there to create
WordPress login page but this tutorial might helpful to all web developer who interested to learn in
WordPress.

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In this tutorial, I will explain how to make a WordPress custom login page without using any plugin.

Steps to make custom login page
===========
1. Make a Wordpress page

2. Make a template in theme's folder

3. Assign created template to Wordpress page.

4. Do code of login on Template file

5. Need to change some redirect urls after logout or for wp-admin

PHP code
================
This contains php script to validate and accept posted data from our HTML form.

global $wpdb;

$err = '';
$success = '';

if(isset($_POST['task']) && $_POST['task'] == 'login' )
{
//We shall SQL escape all inputs to avoid sql injection.
$username = $wpdb-]escape($_POST['log']);
$password = $wpdb-]escape($_POST['pwd']);
$remember = $wpdb-]escape($_POST['remember']);


if( $username == "" || $password == "" ) {
$err = 'Please don\'t leave the required field.';
} else {
$user_data = array();
$user_data['user_login'] = $username;
$user_data['user_password'] = $password;
$user_data['remember'] = $remember;
$user = wp_signon( $user_data, false );

if ( is_wp_error($user) ) {
$err = $user-]get_error_message();
exit();
} else {
wp_set_current_user( $user-]ID, $username );
do_action('set_current_user');

echo '[script type="text/javascript"]window.location='. get_bloginfo('url') .'[/script]';
exit();
}
}
}

Confused
============
Okay, let me explain further the lists of WordPress function we’re using.

is_wp_error: this will check whether variable is a WordPress Error.
wp_set_current_user: We use this wordpress built in function because many user report when using
wp_signon() function logs a user in but for some reason the global user variables such as $current_user
and $user_ID are not populated until the page is refreshed and calling get_currentuserinfo() doesn’t
populate as well. The is_user_logged_in() function also returns false.

Important Videos to watch:
Customize Wordpress Login Page:    • Step by step to Change WordPress Logi...  
Wordpress Widget development in 1 video:    • Complete tutorial for Widget Developm...  

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Also you can learn Wordpress Custom
===============
Wordpress Theme Development: https://goo.gl/MZ8maF

Wordpress Widget Development: https://goo.gl/Dc2htn

Wordpress Plugin Development: https://goo.gl/BA7dYG

Wordpress Theme Options Development: https://goo.gl/Vjv3Ub

Learn backbone.js here! : https://goo.gl/Qd2Pcs

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Online Web Tutor
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