[8.x] StringEncrypter interface for better DX (#36578)

* StringEncrypter interface for better DX

* StyleCI

* Update Encrypter.php

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/Contracts/Encryption/StringEncrypter.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Illuminate\Contracts\Encryption;
+
+interface StringEncrypter
+{
+    /**
+     * Encrypt a string without serialization.
+     *
+     * @param  string  $value
+     * @return string
+     *
+     * @throws \Illuminate\Contracts\Encryption\EncryptException
+     */
+    public function encryptString($value);
+
+    /**
+     * Decrypt the given string without unserialization.
+     *
+     * @param  string  $payload
+     * @return string
+     *
+     * @throws \Illuminate\Contracts\Encryption\DecryptException
+     */
+    public function decryptString($payload);
+}

src/Illuminate/Encryption/Encrypter.php

@@ -5,9 +5,10 @@
 use Illuminate\Contracts\Encryption\DecryptException;
 use Illuminate\Contracts\Encryption\Encrypter as EncrypterContract;
 use Illuminate\Contracts\Encryption\EncryptException;
+use Illuminate\Contracts\Encryption\StringEncrypter;
 use RuntimeException;
 
-class Encrypter implements EncrypterContract
+class Encrypter implements EncrypterContract, StringEncrypter
 {
     /**
      * The encryption key.

src/Illuminate/Foundation/Application.php

@@ -1302,9 +1302,9 @@ public function registerCoreContainerAliases()
             'cache.psr6'           => [\Symfony\Component\Cache\Adapter\Psr16Adapter::class, \Symfony\Component\Cache\Adapter\AdapterInterface::class, \Psr\Cache\CacheItemPoolInterface::class],
             'config'               => [\Illuminate\Config\Repository::class, \Illuminate\Contracts\Config\Repository::class],
             'cookie'               => [\Illuminate\Cookie\CookieJar::class, \Illuminate\Contracts\Cookie\Factory::class, \Illuminate\Contracts\Cookie\QueueingFactory::class],
-            'encrypter'            => [\Illuminate\Encryption\Encrypter::class, \Illuminate\Contracts\Encryption\Encrypter::class],
             'db'                   => [\Illuminate\Database\DatabaseManager::class, \Illuminate\Database\ConnectionResolverInterface::class],
             'db.connection'        => [\Illuminate\Database\Connection::class, \Illuminate\Database\ConnectionInterface::class],
+            'encrypter'            => [\Illuminate\Encryption\Encrypter::class, \Illuminate\Contracts\Encryption\Encrypter::class, \Illuminate\Contracts\Encryption\StringEncrypter::class],
             'events'               => [\Illuminate\Events\Dispatcher::class, \Illuminate\Contracts\Events\Dispatcher::class],
             'files'                => [\Illuminate\Filesystem\Filesystem::class],
             'filesystem'           => [\Illuminate\Filesystem\FilesystemManager::class, \Illuminate\Contracts\Filesystem\Factory::class],