How to Create Registration Web Service (API) in Wordpress

Hello Developers,
   Sometimes we want to register user from Iphone or Android Application. for that you can create a file in your root directory

like

create a folder named "api" in your root directory
and create "register.php" file in this folder
then your url like this www.webtecso.com/api/register.php

for registration you need to pass argument

• Name
• Email
• Password
• Username (if your username same as email then no need to pass this parameter)

then your PHP script is look like below :-

<?php
require ("../wp-load.php");
if ( $_REQUEST['names'] != "" && $_REQUEST['emails'] != "" && $_REQUEST['password'] != "") {
global $wpdb;
if ( !username_exists( $_REQUEST['emails'] ) ) {

$device_id = $_REQUEST['device_id'];

$name = $_REQUEST['names'];
$user_login = $_REQUEST['emails'];
$user_email = $_REQUEST['emails'];
$user_pass = $_REQUEST['password'];

$userdata = compact('name', 'user_login', 'user_email', 'user_pass');
$user_id = wp_insert_user( $userdata );

if ( $_FILES['image_url']['name'] != "" ) {
global $wpdb;
//For Uploading photo from front End
if (!function_exists('wp_generate_attachment_metadata')){
require_once(ABSPATH . "wp-admin" . '/includes/image.php');
require_once(ABSPATH . "wp-admin" . '/includes/file.php');
require_once(ABSPATH . "wp-admin" . '/includes/media.php');
}
$overrides = array( 'test_form' => false);
$file = wp_handle_upload($_FILES['image_url'], $overrides);
$file['url'];

$content = $file['url'];
}

update_user_meta( $user_id, "user_pic_url", $content );


$ar = array('reg'=>'true','msg'=>'success', "id" => $user_id);
echo json_encode( $ar );
exit();

} else {
$ar = array ("reg" => 'false', 'false' => "registration failed: Sorry, that username already exists!");
echo json_encode( $ar );
exit();
}
} else {
$ar = array ("reg" => 'false', "msg" => "Require Field Missing");
echo json_encode( $ar );
exit();
}
?>

this will take url as follows :-
www.webtecso.com/api/register.php?names=&emails=&password=

then return error or success.
if your successfully registered then its return user id in JSON format
If there is any error then its return error in JSON format