Username or Email login

uoe.php

<?php

//Заставляем работать форму авторизации GF
/*
 * This hook fires after the form was submitted and the whole data was validate, we’ll bind it to the form which have just created.
 */
// the _14 prefix has to match the id of the form you have created
add_action( "gform_after_submission_14", "login_form_after_submission", 10, 2 );

function login_form_after_submission($entry, $form) {
	// get the username and pass
	$username_or_email = $entry[4];

	// check if the user has provided an email
	if ( strpos( $username_or_email, '@' ) ) {
		if ( !is_email( $username_or_email ) and ! email_exists( $username_or_email ) ) {
			// either email is wrong or the user with such an email doesn't exist
			return;
		} else {
			$user = get_user_by( 'email', $username_or_email );
			$username = $user->user_login;
		}
	} else {
		$username = $username_or_email;
	}

	if ( !username_exists( $username ) ) {
		return;
	}
	
	$pass = $entry[12];
	$creds = array();
	// create the credentials array
	$creds['user_login'] = $username;
	$creds['user_password'] = $pass;
	// sign in the user and set him as the logged in user
	$sign = wp_signon( $creds );
	wp_set_current_user( $sign->ID );
}

/*
 * This hook fires during the form submission process and iterates over every field.
 */
// the _14 prefix has to match the id of the form you have created
add_filter( "gform_field_validation_14", "login_validate_field", 10, 4 );

function login_validate_field($result, $value, $form, $field) {
	// make sure this variable is global
	// this function is fired via recurrence for each field, s
	global $user;
	// validate username
	if ( $field['cssClass'] === 'username' ) {

		// check if the user has provided an email
		if ( strpos( $value, '@' ) ) {
			if ( !is_email( $value ) and ! email_exists( $value ) ) {
				$result["is_valid"] = false;
				$result["message"] = "Invalid email provided.";
			} else {
				$user = get_user_by( 'email', $value );
			}
		} else {
			$user = get_user_by( 'login', $value );
			if ( empty( $user->user_login ) ) {
				$result["is_valid"] = false;
				$result["message"] = "Invalid username provided.";
			}
		}
	}
	// validate pass
	if ( $field['cssClass'] === 'password' ) {
		if ( !$user or ! wp_check_password( $value, $user->data->user_pass, $user->ID ) ) {
			$result["is_valid"] = false;
			$result["message"] = "Invalid password provided.";
		}
	}
	return $result;
}

// Auto login to site after GF User Registration Form Submittal
function we_autologin_gfregistration($user_id, $config, $entry, $password) {
	wp_set_auth_cookie( $user_id, false, '' );
}

add_action( 'gform_user_registered', 'we_autologin_gfregistration', 10, 4 );