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The Users API provides functions for constructing URLs that allow the user to sign in or sign out, then be redirected back to your application.
UserService::createLoginUrl() and UserService::createLogoutUrl() each take a destination URL for the application, and return a URL for signing in or signing out that redirects back to the given URL afterward.
use google\appengine\api\users\User;use google\appengine\api\users\UserService;$user = UserService::getCurrentUser();if (isset($user)) { echo sprintf('Welcome, %s! (<a href="%s">sign out</a>)', $user->getNickname(), UserService::createLogoutUrl('/'));} else { echo sprintf('<a href="%s">Sign in or register</a>', UserService::createLoginUrl('/'));}
The development web server simulates Google Accounts using its own sign-in and sign-out facilities. When you sign in to your application on the development web server, the server prompts you for an email address to use for the session. See The Development Web Server for more information.
Tip: An easy way to restrict access to a part of your application to signed in users is to use the login: required configuration element for the URL handler. See Configuring an App.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-25 UTC."],[[["\u003cp\u003eThe Users API allows developers to create URLs for user sign-in and sign-out actions, redirecting them back to the application afterward.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eUserService::createLoginUrl()\u003c/code\u003e and \u003ccode\u003eUserService::createLogoutUrl()\u003c/code\u003e functions generate the URLs for signing in and out, respectively, while requiring a destination URL for redirection.\u003c/p\u003e\n"],["\u003cp\u003eThe development web server simulates Google Accounts with its sign-in/sign-out mechanisms, prompting for an email address when signing in locally.\u003c/p\u003e\n"],["\u003cp\u003eAccess to specific parts of an application can be restricted to signed-in users using the \u003ccode\u003elogin: required\u003c/code\u003e configuration element for URL handlers.\u003c/p\u003e\n"],["\u003cp\u003eThis API is specific to first-generation runtimes in the App Engine standard environment and has different options in later versions.\u003c/p\u003e\n"]]],[],null,["# Login URLs\n\nThe Users API provides functions for constructing URLs that allow the user to sign in or sign out, then be redirected back to your application.\n| This page describes how to use the legacy bundled services and APIs. This API can only run in first-generation runtimes in the App Engine standard environment. If you are updating to the App Engine PHP 7/8 runtime, refer to the [migration guide](/appengine/migration-center/standard/migrate-to-second-gen/php-differences) to learn about your migration options for legacy bundled services.\n\n`UserService::createLoginUrl()` and `UserService::createLogoutUrl()` each take a destination URL for the application, and return a URL for signing in or signing out that redirects back to the given URL afterward. \n\n```php\nuse google\\appengine\\api\\users\\User;\nuse google\\appengine\\api\\users\\UserService;\n\n$user = UserService::getCurrentUser();\nif (isset($user)) {\n echo sprintf('Welcome, %s! (\u003ca href=\"%s\"\u003esign out\u003c/a\u003e)',\n $user-\u003egetNickname(),\n UserService::createLogoutUrl('/'));\n} else {\n echo sprintf('\u003ca href=\"%s\"\u003eSign in or register\u003c/a\u003e',\n UserService::createLoginUrl('/'));\n}\n```\n\nThe development web server simulates Google Accounts using its own sign-in and sign-out facilities. When you sign in to your application on the development web server, the server prompts you for an email address to use for the session. See [The Development Web Server](/appengine/docs/legacy/standard/php/tools/using-local-server) for more information.\n\n**Tip:** An easy way to restrict access to a part of your application to signed in users is to use the `login: required` configuration element for the URL handler. See [Configuring an App](/appengine/docs/legacy/standard/php/config/appref)."]]
