<?php

// Exit if accessed directly

if ( ! defined( 'ABSPATH' ) ) exit;



/**

 * Run check if username exists

 * @uses action hooks: wp_ajax_nopriv_ultimatemember_check_username_exists, wp_ajax_ultimatemember_check_username_exists

 * @return boolean

 */

function ultimatemember_check_username_exists() {

	$username = isset($_REQUEST['username']) ? $_REQUEST['username'] : '';

	$exists   = username_exists( $username );



	/**

	 * UM hook

	 *

	 * @type filter

	 * @title um_validate_username_exists

	 * @description Change username exists validation

	 * @input_vars

	 * [{"var":"$exists","type":"bool","desc":"Exists?"},

	 * {"var":"$username","type":"string","desc":"Username"}]

	 * @change_log

	 * ["Since: 2.0"]

	 * @usage

	 * <?php add_filter( 'um_validate_username_exists', 'function_name', 10, 2 ); ?>

	 * @example

	 * <?php

	 * add_filter( 'um_validate_username_exists', 'my_validate_username_exists', 10, 2 );

	 * function my_account_pre_updating_profile( $exists, $username ) {

	 *     // your code here

	 *     return $exists;

	 * }

	 * ?>

	 */

	$exists = apply_filters( 'um_validate_username_exists', $exists, $username );



	if ( $exists ) {

		echo 1;

	} else {

		echo 0;

	}



	die();

}

add_action('wp_ajax_nopriv_ultimatemember_check_username_exists', 'ultimatemember_check_username_exists');

add_action('wp_ajax_ultimatemember_check_username_exists', 'ultimatemember_check_username_exists');