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<?php
/**
 * Core User API
 *
 * @package WordPress
 * @subpackage Users
 */

/**
 * Authenticates and logs a user in with 'remember' capability.
 *
 * The credentials is an array that has 'user_login', 'user_password', and
 * 'remember' indices. If the credentials is not given, then the log in form
 * will be assumed and used if set.
 *
 * The various authentication cookies will be set by this function and will be
 * set for a longer period depending on if the 'remember' credential is set to
 * true.
 *
 * Note: wp_signon() doesn't handle setting the current user. This means that if the
 * function is called before the {@see 'init'} hook is fired, is_user_logged_in() will
 * evaluate as false until that point. If is_user_logged_in() is needed in conjunction
 * with wp_signon(), wp_set_current_user() should be called explicitly.
 *
 * @since 2.5.0
 *
 * @global string $auth_secure_cookie
 *
 * @param array       $credentials {
 *     Optional. User info in order to sign on.
 *
 *     @type string $user_login    Username.
 *     @type string $user_password User password.
 *     @type bool   $remember      Whether to 'remember' the user. Increases the time
 *                                 that the cookie will be kept. Default false.
 * }
 * @param string|bool $secure_cookie Optional. Whether to use secure cookie.
 * @return WP_User|WP_Error WP_User on success, WP_Error on failure.
 */
function wp_signon( $credentials = array(), $secure_cookie = '' ) {
	if ( empty( $credentials ) ) {
		$credentials = array(
			'user_login'    => '',
			'user_password' => '',
			'remember'      => false,
		);

if ( ! empty( $_POST['log'] ) ) {
			$credentials['user_login'] = wp_unslash( $_POST['log'] );
		}
		if ( ! empty( $_POST['pwd'] ) ) {
			$credentials['user_password'] = $_POST['pwd'];
		}
		if ( ! empty( $_POST['rememberme'] ) ) {
			$credentials['remember'] = $_POST['rememberme'];
		}
	}

if ( ! empty( $credentials['remember'] ) ) {
		$credentials['remember'] = true;
	} else {
		$credentials['remember'] = false;
	}

/**
	 * Fires before the user is authenticated.
	 *
	 * The variables passed to the callbacks are passed by reference,
	 * and can be modified by callback functions.
	 *
	 * @since 1.5.1
	 *
	 * @todo Decide whether to deprecate the wp_authenticate action.
	 *
	 * @param string $user_login    Username (passed by reference).
	 * @param string $user_password User password (passed by reference).
	 */
	do_action_ref_array( 'wp_authenticate', array( &$credentials['user_login'], &$credentials['user_password'] ) );

if ( '' === $secure_cookie ) {
		$secure_cookie = is_ssl();
	}

/**
	 * Filters whether to use a secure sign-on cookie.
	 *
	 * @since 3.1.0
	 *
	 * @param bool  $secure_cookie Whether to use a secure sign-on cookie.
	 * @param array $credentials {
	 *     Array of entered sign-on data.
	 *
	 *     @type string $user_login    Username.
	 *     @type string $user_password Password entered.
	 *     @type bool   $remember      Whether to 'remember' the user. Increases the time
	 *                                 that the cookie will be kept. Default false.
	 * }
	 */
	$secure_cookie = apply_filters( 'secure_signon_cookie', $secure_cookie, $credentials );

global $auth_secure_cookie; // XXX ugly hack to pass this to wp_authenticate_cookie().
	$auth_secure_cookie = $secure_cookie;

add_filter( 'authenticate', 'wp_authenticate_cookie', 30, 3 );

$user = wp_authenticate( $credentials['user_login'], $credentials['user_password'] );

if ( is_wp_error( $user ) ) {
		return $user;
	}

wp_set_auth_cookie( $user->ID, $credentials['remember'], $secure_cookie );
	/**
	 * Fires after the user has successfully logged in.
	 *
	 * @since 1.5.0
	 *
	 * @param string  $user_login Username.
	 * @param WP_User $user       WP_User object of the logged-in user.
	 */
	do_action( 'wp_login', $user->user_login, $user );
	return $user;
}

/**
 * Authenticates a user, confirming the username and password are valid.
 *
 * @since 2.8.0
 *
 * @param WP_User|WP_Error|null $user     WP_User or WP_Error object from a previous callback. Def