Index: wp-login.php
===================================================================
--- wp-login.php	(revision 20252)
+++ wp-login.php	(working copy)
@@ -22,323 +22,8 @@
 	}
 }
 
-/**
- * Outputs the header for the login page.
- *
- * @uses do_action() Calls the 'login_head' for outputting HTML in the Log In
- *		header.
- * @uses apply_filters() Calls 'login_headerurl' for the top login link.
- * @uses apply_filters() Calls 'login_headertitle' for the top login title.
- * @uses apply_filters() Calls 'login_message' on the message to display in the
- *		header.
- * @uses $error The error global, which is checked for displaying errors.
- *
- * @param string $title Optional. WordPress Log In Page title to display in
- *		<title/> element.
- * @param string $message Optional. Message to display in header.
- * @param WP_Error $wp_error Optional. WordPress Error Object
- */
-function login_header($title = 'Log In', $message = '', $wp_error = '') {
-	global $error, $is_iphone, $interim_login, $current_site;
+require ABSPATH . WPINC . '/functions.wp-login.php';
 
-	// Don't index any of these forms
-	add_action( 'login_head', 'wp_no_robots' );
-
-	if ( empty($wp_error) )
-		$wp_error = new WP_Error();
-
-	// Shake it!
-	$shake_error_codes = array( 'empty_password', 'empty_email', 'invalid_email', 'invalidcombo', 'empty_username', 'invalid_username', 'incorrect_password' );
-	$shake_error_codes = apply_filters( 'shake_error_codes', $shake_error_codes );
-
-	if ( $shake_error_codes && $wp_error->get_error_code() && in_array( $wp_error->get_error_code(), $shake_error_codes ) )
-		add_action( 'login_head', 'wp_shake_js', 12 );
-
-	?>
-<!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
-<head>
-	<meta http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset=<?php bloginfo('charset'); ?>" />
-	<title><?php bloginfo('name'); ?> &rsaquo; <?php echo $title; ?></title>
-<?php
-	wp_admin_css( 'wp-admin', true );
-	wp_admin_css( 'colors-fresh', true );
-
-	if ( $is_iphone ) { ?>
-	<meta name="viewport" content="width=320; initial-scale=0.9; maximum-scale=1.0; user-scalable=0;" />
-	<style type="text/css" media="screen">
-	.login form, .login .message, #login_error { margin-left: 0px; }
-	.login #nav, .login #backtoblog { margin-left: 8px; }
-	.login h1 a { width: auto; }
-	#login { padding: 20px 0; }
-	</style>
-<?php
-	}
-
-	do_action( 'login_enqueue_scripts' );
-	do_action( 'login_head' );
-
-	if ( is_multisite() ) {
-		$login_header_url   = network_home_url();
-		$login_header_title = $current_site->site_name;
-	} else {
-		$login_header_url   = __( 'http://wordpress.org/' );
-		$login_header_title = __( 'Powered by WordPress' );
-	}
-
-	$login_header_url   = apply_filters( 'login_headerurl',   $login_header_url   );
-	$login_header_title = apply_filters( 'login_headertitle', $login_header_title );
-?>
-</head>
-<body class="login">
-	<div id="login">
-		<h1><a href="<?php echo esc_url( $login_header_url ); ?>" title="<?php echo esc_attr( $login_header_title ); ?>"><?php bloginfo( 'name' ); ?></a></h1>
-<?php
-	unset( $login_header_url, $login_header_title );
-
-	$message = apply_filters('login_message', $message);
-	if ( !empty( $message ) ) echo $message . "\n";
-
-	// In case a plugin uses $error rather than the $wp_errors object
-	if ( !empty( $error ) ) {
-		$wp_error->add('error', $error);
-		unset($error);
-	}
-
-	if ( $wp_error->get_error_code() ) {
-		$errors = '';
-		$messages = '';
-		foreach ( $wp_error->get_error_codes() as $code ) {
-			$severity = $wp_error->get_error_data($code);
-			foreach ( $wp_error->get_error_messages($code) as $error ) {
-				if ( 'message' == $severity )
-					$messages .= '	' . $error . "<br />\n";
-				else
-					$errors .= '	' . $error . "<br />\n";
-			}
-		}
-		if ( !empty($errors) )
-			echo '<div id="login_error">' . apply_filters('login_errors', $errors) . "</div>\n";
-		if ( !empty($messages) )
-			echo '<p class="message">' . apply_filters('login_messages', $messages) . "</p>\n";
-	}
-} // End of login_header()
-
-/**
- * Outputs the footer for the login page.
- *
- * @param string $input_id Which input to auto-focus
- */
-function login_footer($input_id = '') {
-	?>
-	<p id="backtoblog"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php esc_attr_e( 'Are you lost?' ); ?>"><?php printf( __( '&larr; Back to %s' ), get_bloginfo( 'title', 'display' ) ); ?></a></p>
-	</div>
-
-<?php if ( !empty($input_id) ) : ?>
-<script type="text/javascript">
-try{document.getElementById('<?php echo $input_id; ?>').focus();}catch(e){}
-if(typeof wpOnload=='function')wpOnload();
-</script>
-<?php endif; ?>
-
-<?php do_action('login_footer'); ?>
-<div class="clear"></div>
-</body>
-</html>
-<?php
-}
-
-function wp_shake_js() {
-	global $is_iphone;
-	if ( $is_iphone )
-		return;
-?>
-<script type="text/javascript">
-addLoadEvent = function(func){if(typeof jQuery!="undefined")jQuery(document).ready(func);else if(typeof wpOnload!='function'){wpOnload=func;}else{var oldonload=wpOnload;wpOnload=function(){oldonload();func();}}};
-function s(id,pos){g(id).left=pos+'px';}
-function g(id){return document.getElementById(id).style;}
-function shake(id,a,d){c=a.shift();s(id,c);if(a.length>0){setTimeout(function(){shake(id,a,d);},d);}else{try{g(id).position='static';wp_attempt_focus();}catch(e){}}}
-addLoadEvent(function(){ var p=new Array(15,30,15,0,-15,-30,-15,0);p=p.concat(p.concat(p));var i=document.forms[0].id;g(i).position='relative';shake(i,p,20);});
-</script>
-<?php
-}
-
-/**
- * Handles sending password retrieval email to user.
- *
- * @uses $wpdb WordPress Database object
- *
- * @return bool|WP_Error True: when finish. WP_Error on error
- */
-function retrieve_password() {
-	global $wpdb, $current_site;
-
-	$errors = new WP_Error();
-
-	if ( empty( $_POST['user_login'] ) ) {
-		$errors->add('empty_username', __('<strong>ERROR</strong>: Enter a username or e-mail address.'));
-	} else if ( strpos( $_POST['user_login'], '@' ) ) {
-		$user_data = get_user_by( 'email', trim( $_POST['user_login'] ) );
-		if ( empty( $user_data ) )
-			$errors->add('invalid_email', __('<strong>ERROR</strong>: There is no user registered with that email address.'));
-	} else {
-		$login = trim($_POST['user_login']);
-		$user_data = get_user_by('login', $login);
-	}
-
-	do_action('lostpassword_post');
-
-	if ( $errors->get_error_code() )
-		return $errors;
-
-	if ( !$user_data ) {
-		$errors->add('invalidcombo', __('<strong>ERROR</strong>: Invalid username or e-mail.'));
-		return $errors;
-	}
-
-	// redefining user_login ensures we return the right case in the email
-	$user_login = $user_data->user_login;
-	$user_email = $user_data->user_email;
-
-	do_action('retreive_password', $user_login);  // Misspelled and deprecated
-	do_action('retrieve_password', $user_login);
-
-	$allow = apply_filters('allow_password_reset', true, $user_data->ID);
-
-	if ( ! $allow )
-		return new WP_Error('no_password_reset', __('Password reset is not allowed for this user'));
-	else if ( is_wp_error($allow) )
-		return $allow;
-
-	$key = $wpdb->get_var($wpdb->prepare("SELECT user_activation_key FROM $wpdb->users WHERE user_login = %s", $user_login));
-	if ( empty($key) ) {
-		// Generate something random for a key...
-		$key = wp_generate_password(20, false);
-		do_action('retrieve_password_key', $user_login, $key);
-		// Now insert the new md5 key into the db
-		$wpdb->update($wpdb->users, array('user_activation_key' => $key), array('user_login' => $user_login));
-	}
-	$message = __('Someone requested that the password be reset for the following account:') . "\r\n\r\n";
-	$message .= network_home_url( '/' ) . "\r\n\r\n";
-	$message .= sprintf(__('Username: %s'), $user_login) . "\r\n\r\n";
-	$message .= __('If this was a mistake, just ignore this email and nothing will happen.') . "\r\n\r\n";
-	$message .= __('To reset your password, visit the following address:') . "\r\n\r\n";
-	$message .= '<' . network_site_url("wp-login.php?action=rp&key=$key&login=" . rawurlencode($user_login), 'login') . ">\r\n";
-
-	if ( is_multisite() )
-		$blogname = $GLOBALS['current_site']->site_name;
-	else
-		// The blogname option is escaped with esc_html on the way into the database in sanitize_option
-		// we want to reverse this for the plain text arena of emails.
-		$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
-
-	$title = sprintf( __('[%s] Password Reset'), $blogname );
-
-	$title = apply_filters('retrieve_password_title', $title);
-	$message = apply_filters('retrieve_password_message', $message, $key);
-
-	if ( $message && !wp_mail($user_email, $title, $message) )
-		wp_die( __('The e-mail could not be sent.') . "<br />\n" . __('Possible reason: your host may have disabled the mail() function...') );
-
-	return true;
-}
-
-/**
- * Retrieves a user row based on password reset key and login
- *
- * @uses $wpdb WordPress Database object
- *
- * @param string $key Hash to validate sending user's password
- * @param string $login The user login
- * @return object|WP_Error User's database row on success, error object for invalid keys
- */
-function check_password_reset_key($key, $login) {
-	global $wpdb;
-
-	$key = preg_replace('/[^a-z0-9]/i', '', $key);
-
-	if ( empty( $key ) || !is_string( $key ) )
-		return new WP_Error('invalid_key', __('Invalid key'));
-
-	if ( empty($login) || !is_string($login) )
-		return new WP_Error('invalid_key', __('Invalid key'));
-
-	$user = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->users WHERE user_activation_key = %s AND user_login = %s", $key, $login));
-
-	if ( empty( $user ) )
-		return new WP_Error('invalid_key', __('Invalid key'));
-
-	return $user;
-}
-
-/**
- * Handles resetting the user's password.
- *
- * @param object $user The user
- * @param string $new_pass New password for the user in plaintext
- */
-function reset_password($user, $new_pass) {
-	do_action('password_reset', $user, $new_pass);
-
-	wp_set_password($new_pass, $user->ID);
-
-	wp_password_change_notification($user);
-}
-
-/**
- * Handles registering a new user.
- *
- * @param string $user_login User's username for logging in
- * @param string $user_email User's email address to send password and add
- * @return int|WP_Error Either user's ID or error on failure.
- */
-function register_new_user( $user_login, $user_email ) {
-	$errors = new WP_Error();
-
-	$sanitized_user_login = sanitize_user( $user_login );
-	$user_email = apply_filters( 'user_registration_email', $user_email );
-
-	// Check the username
-	if ( $sanitized_user_login == '' ) {
-		$errors->add( 'empty_username', __( '<strong>ERROR</strong>: Please enter a username.' ) );
-	} elseif ( ! validate_username( $user_login ) ) {
-		$errors->add( 'invalid_username', __( '<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.' ) );
-		$sanitized_user_login = '';
-	} elseif ( username_exists( $sanitized_user_login ) ) {
-		$errors->add( 'username_exists', __( '<strong>ERROR</strong>: This username is already registered, please choose another one.' ) );
-	}
-
-	// Check the e-mail address
-	if ( $user_email == '' ) {
-		$errors->add( 'empty_email', __( '<strong>ERROR</strong>: Please type your e-mail address.' ) );
-	} elseif ( ! is_email( $user_email ) ) {
-		$errors->add( 'invalid_email', __( '<strong>ERROR</strong>: The email address isn&#8217;t correct.' ) );
-		$user_email = '';
-	} elseif ( email_exists( $user_email ) ) {
-		$errors->add( 'email_exists', __( '<strong>ERROR</strong>: This email is already registered, please choose another one.' ) );
-	}
-
-	do_action( 'register_post', $sanitized_user_login, $user_email, $errors );
-
-	$errors = apply_filters( 'registration_errors', $errors, $sanitized_user_login, $user_email );
-
-	if ( $errors->get_error_code() )
-		return $errors;
-
-	$user_pass = wp_generate_password( 12, false);
-	$user_id = wp_create_user( $sanitized_user_login, $user_pass, $user_email );
-	if ( ! $user_id ) {
-		$errors->add( 'registerfail', sprintf( __( '<strong>ERROR</strong>: Couldn&#8217;t register you... please contact the <a href="mailto:%s">webmaster</a> !' ), get_option( 'admin_email' ) ) );
-		return $errors;
-	}
-
-	update_user_option( $user_id, 'default_password_nag', true, true ); //Set up the Password change nag.
-
-	wp_new_user_notification( $user_id, $user_pass );
-
-	return $user_id;
-}
-
 //
 // Main
 //
Index: wp-includes/functions.wp-login.php
===================================================================
--- wp-includes/functions.wp-login.php	(revision 0)
+++ wp-includes/functions.wp-login.php	(revision 0)
@@ -0,0 +1,318 @@
+<?php
+
+/**
+ * Outputs the header for the login page.
+ *
+ * @uses do_action() Calls the 'login_head' for outputting HTML in the Log In
+ *		header.
+ * @uses apply_filters() Calls 'login_headerurl' for the top login link.
+ * @uses apply_filters() Calls 'login_headertitle' for the top login title.
+ * @uses apply_filters() Calls 'login_message' on the message to display in the
+ *		header.
+ * @uses $error The error global, which is checked for displaying errors.
+ *
+ * @param string $title Optional. WordPress Log In Page title to display in
+ *		<title/> element.
+ * @param string $message Optional. Message to display in header.
+ * @param WP_Error $wp_error Optional. WordPress Error Object
+ */
+function login_header($title = 'Log In', $message = '', $wp_error = '') {
+	global $error, $is_iphone, $interim_login, $current_site;
+
+	// Don't index any of these forms
+	add_action( 'login_head', 'wp_no_robots' );
+
+	if ( empty($wp_error) )
+		$wp_error = new WP_Error();
+
+	// Shake it!
+	$shake_error_codes = array( 'empty_password', 'empty_email', 'invalid_email', 'invalidcombo', 'empty_username', 'invalid_username', 'incorrect_password' );
+	$shake_error_codes = apply_filters( 'shake_error_codes', $shake_error_codes );
+
+	if ( $shake_error_codes && $wp_error->get_error_code() && in_array( $wp_error->get_error_code(), $shake_error_codes ) )
+		add_action( 'login_head', 'wp_shake_js', 12 );
+
+	?>
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
+<head>
+	<meta http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset=<?php bloginfo('charset'); ?>" />
+	<title><?php bloginfo('name'); ?> &rsaquo; <?php echo $title; ?></title>
+<?php
+	wp_admin_css( 'wp-admin', true );
+	wp_admin_css( 'colors-fresh', true );
+
+	if ( $is_iphone ) { ?>
+	<meta name="viewport" content="width=320; initial-scale=0.9; maximum-scale=1.0; user-scalable=0;" />
+	<style type="text/css" media="screen">
+	.login form, .login .message, #login_error { margin-left: 0px; }
+	.login #nav, .login #backtoblog { margin-left: 8px; }
+	.login h1 a { width: auto; }
+	#login { padding: 20px 0; }
+	</style>
+<?php
+	}
+
+	do_action( 'login_enqueue_scripts' );
+	do_action( 'login_head' );
+
+	if ( is_multisite() ) {
+		$login_header_url   = network_home_url();
+		$login_header_title = $current_site->site_name;
+	} else {
+		$login_header_url   = __( 'http://wordpress.org/' );
+		$login_header_title = __( 'Powered by WordPress' );
+	}
+
+	$login_header_url   = apply_filters( 'login_headerurl',   $login_header_url   );
+	$login_header_title = apply_filters( 'login_headertitle', $login_header_title );
+?>
+</head>
+<body class="login">
+	<div id="login">
+		<h1><a href="<?php echo esc_url( $login_header_url ); ?>" title="<?php echo esc_attr( $login_header_title ); ?>"><?php bloginfo( 'name' ); ?></a></h1>
+<?php
+	unset( $login_header_url, $login_header_title );
+
+	$message = apply_filters('login_message', $message);
+	if ( !empty( $message ) ) echo $message . "\n";
+
+	// In case a plugin uses $error rather than the $wp_errors object
+	if ( !empty( $error ) ) {
+		$wp_error->add('error', $error);
+		unset($error);
+	}
+
+	if ( $wp_error->get_error_code() ) {
+		$errors = '';
+		$messages = '';
+		foreach ( $wp_error->get_error_codes() as $code ) {
+			$severity = $wp_error->get_error_data($code);
+			foreach ( $wp_error->get_error_messages($code) as $error ) {
+				if ( 'message' == $severity )
+					$messages .= '	' . $error . "<br />\n";
+				else
+					$errors .= '	' . $error . "<br />\n";
+			}
+		}
+		if ( !empty($errors) )
+			echo '<div id="login_error">' . apply_filters('login_errors', $errors) . "</div>\n";
+		if ( !empty($messages) )
+			echo '<p class="message">' . apply_filters('login_messages', $messages) . "</p>\n";
+	}
+} // End of login_header()
+
+/**
+ * Outputs the footer for the login page.
+ *
+ * @param string $input_id Which input to auto-focus
+ */
+function login_footer($input_id = '') {
+	?>
+	<p id="backtoblog"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php esc_attr_e( 'Are you lost?' ); ?>"><?php printf( __( '&larr; Back to %s' ), get_bloginfo( 'title', 'display' ) ); ?></a></p>
+	</div>
+
+<?php if ( !empty($input_id) ) : ?>
+<script type="text/javascript">
+try{document.getElementById('<?php echo $input_id; ?>').focus();}catch(e){}
+if(typeof wpOnload=='function')wpOnload();
+</script>
+<?php endif; ?>
+
+<?php do_action('login_footer'); ?>
+<div class="clear"></div>
+</body>
+</html>
+<?php
+}
+
+function wp_shake_js() {
+	global $is_iphone;
+	if ( $is_iphone )
+		return;
+?>
+<script type="text/javascript">
+addLoadEvent = function(func){if(typeof jQuery!="undefined")jQuery(document).ready(func);else if(typeof wpOnload!='function'){wpOnload=func;}else{var oldonload=wpOnload;wpOnload=function(){oldonload();func();}}};
+function s(id,pos){g(id).left=pos+'px';}
+function g(id){return document.getElementById(id).style;}
+function shake(id,a,d){c=a.shift();s(id,c);if(a.length>0){setTimeout(function(){shake(id,a,d);},d);}else{try{g(id).position='static';wp_attempt_focus();}catch(e){}}}
+addLoadEvent(function(){ var p=new Array(15,30,15,0,-15,-30,-15,0);p=p.concat(p.concat(p));var i=document.forms[0].id;g(i).position='relative';shake(i,p,20);});
+</script>
+<?php
+}
+
+/**
+ * Handles sending password retrieval email to user.
+ *
+ * @uses $wpdb WordPress Database object
+ *
+ * @return bool|WP_Error True: when finish. WP_Error on error
+ */
+function retrieve_password() {
+	global $wpdb, $current_site;
+
+	$errors = new WP_Error();
+
+	if ( empty( $_POST['user_login'] ) ) {
+		$errors->add('empty_username', __('<strong>ERROR</strong>: Enter a username or e-mail address.'));
+	} else if ( strpos( $_POST['user_login'], '@' ) ) {
+		$user_data = get_user_by( 'email', trim( $_POST['user_login'] ) );
+		if ( empty( $user_data ) )
+			$errors->add('invalid_email', __('<strong>ERROR</strong>: There is no user registered with that email address.'));
+	} else {
+		$login = trim($_POST['user_login']);
+		$user_data = get_user_by('login', $login);
+	}
+
+	do_action('lostpassword_post');
+
+	if ( $errors->get_error_code() )
+		return $errors;
+
+	if ( !$user_data ) {
+		$errors->add('invalidcombo', __('<strong>ERROR</strong>: Invalid username or e-mail.'));
+		return $errors;
+	}
+
+	// redefining user_login ensures we return the right case in the email
+	$user_login = $user_data->user_login;
+	$user_email = $user_data->user_email;
+
+	do_action('retreive_password', $user_login);  // Misspelled and deprecated
+	do_action('retrieve_password', $user_login);
+
+	$allow = apply_filters('allow_password_reset', true, $user_data->ID);
+
+	if ( ! $allow )
+		return new WP_Error('no_password_reset', __('Password reset is not allowed for this user'));
+	else if ( is_wp_error($allow) )
+		return $allow;
+
+	$key = $wpdb->get_var($wpdb->prepare("SELECT user_activation_key FROM $wpdb->users WHERE user_login = %s", $user_login));
+	if ( empty($key) ) {
+		// Generate something random for a key...
+		$key = wp_generate_password(20, false);
+		do_action('retrieve_password_key', $user_login, $key);
+		// Now insert the new md5 key into the db
+		$wpdb->update($wpdb->users, array('user_activation_key' => $key), array('user_login' => $user_login));
+	}
+	$message = __('Someone requested that the password be reset for the following account:') . "\r\n\r\n";
+	$message .= network_home_url( '/' ) . "\r\n\r\n";
+	$message .= sprintf(__('Username: %s'), $user_login) . "\r\n\r\n";
+	$message .= __('If this was a mistake, just ignore this email and nothing will happen.') . "\r\n\r\n";
+	$message .= __('To reset your password, visit the following address:') . "\r\n\r\n";
+	$message .= '<' . network_site_url("wp-login.php?action=rp&key=$key&login=" . rawurlencode($user_login), 'login') . ">\r\n";
+
+	if ( is_multisite() )
+		$blogname = $GLOBALS['current_site']->site_name;
+	else
+		// The blogname option is escaped with esc_html on the way into the database in sanitize_option
+		// we want to reverse this for the plain text arena of emails.
+		$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
+
+	$title = sprintf( __('[%s] Password Reset'), $blogname );
+
+	$title = apply_filters('retrieve_password_title', $title);
+	$message = apply_filters('retrieve_password_message', $message, $key);
+
+	if ( $message && !wp_mail($user_email, $title, $message) )
+		wp_die( __('The e-mail could not be sent.') . "<br />\n" . __('Possible reason: your host may have disabled the mail() function...') );
+
+	return true;
+}
+
+/**
+ * Retrieves a user row based on password reset key and login
+ *
+ * @uses $wpdb WordPress Database object
+ *
+ * @param string $key Hash to validate sending user's password
+ * @param string $login The user login
+ * @return object|WP_Error User's database row on success, error object for invalid keys
+ */
+function check_password_reset_key($key, $login) {
+	global $wpdb;
+
+	$key = preg_replace('/[^a-z0-9]/i', '', $key);
+
+	if ( empty( $key ) || !is_string( $key ) )
+		return new WP_Error('invalid_key', __('Invalid key'));
+
+	if ( empty($login) || !is_string($login) )
+		return new WP_Error('invalid_key', __('Invalid key'));
+
+	$user = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->users WHERE user_activation_key = %s AND user_login = %s", $key, $login));
+
+	if ( empty( $user ) )
+		return new WP_Error('invalid_key', __('Invalid key'));
+
+	return $user;
+}
+
+/**
+ * Handles resetting the user's password.
+ *
+ * @param object $user The user
+ * @param string $new_pass New password for the user in plaintext
+ */
+function reset_password($user, $new_pass) {
+	do_action('password_reset', $user, $new_pass);
+
+	wp_set_password($new_pass, $user->ID);
+
+	wp_password_change_notification($user);
+}
+
+/**
+ * Handles registering a new user.
+ *
+ * @param string $user_login User's username for logging in
+ * @param string $user_email User's email address to send password and add
+ * @return int|WP_Error Either user's ID or error on failure.
+ */
+function register_new_user( $user_login, $user_email ) {
+	$errors = new WP_Error();
+
+	$sanitized_user_login = sanitize_user( $user_login );
+	$user_email = apply_filters( 'user_registration_email', $user_email );
+
+	// Check the username
+	if ( $sanitized_user_login == '' ) {
+		$errors->add( 'empty_username', __( '<strong>ERROR</strong>: Please enter a username.' ) );
+	} elseif ( ! validate_username( $user_login ) ) {
+		$errors->add( 'invalid_username', __( '<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.' ) );
+		$sanitized_user_login = '';
+	} elseif ( username_exists( $sanitized_user_login ) ) {
+		$errors->add( 'username_exists', __( '<strong>ERROR</strong>: This username is already registered, please choose another one.' ) );
+	}
+
+	// Check the e-mail address
+	if ( $user_email == '' ) {
+		$errors->add( 'empty_email', __( '<strong>ERROR</strong>: Please type your e-mail address.' ) );
+	} elseif ( ! is_email( $user_email ) ) {
+		$errors->add( 'invalid_email', __( '<strong>ERROR</strong>: The email address isn&#8217;t correct.' ) );
+		$user_email = '';
+	} elseif ( email_exists( $user_email ) ) {
+		$errors->add( 'email_exists', __( '<strong>ERROR</strong>: This email is already registered, please choose another one.' ) );
+	}
+
+	do_action( 'register_post', $sanitized_user_login, $user_email, $errors );
+
+	$errors = apply_filters( 'registration_errors', $errors, $sanitized_user_login, $user_email );
+
+	if ( $errors->get_error_code() )
+		return $errors;
+
+	$user_pass = wp_generate_password( 12, false);
+	$user_id = wp_create_user( $sanitized_user_login, $user_pass, $user_email );
+	if ( ! $user_id ) {
+		$errors->add( 'registerfail', sprintf( __( '<strong>ERROR</strong>: Couldn&#8217;t register you... please contact the <a href="mailto:%s">webmaster</a> !' ), get_option( 'admin_email' ) ) );
+		return $errors;
+	}
+
+	update_user_option( $user_id, 'default_password_nag', true, true ); //Set up the Password change nag.
+
+	wp_new_user_notification( $user_id, $user_pass );
+
+	return $user_id;
+}
