I want to upgrade only the PHP version for my Laravel project,
My Laravel Framework version is 6.20.19 and PHP version is 7.4,
now I want to upgrade only php version php 7.4 to PHP 8.1 for my current Laravel project, how can I do without upgrading the Laravel version?
I have configured PHP 8.1 in my Linux System and configured my Laravel 6.20 version project, and made some changes in composer.json.
"require": {
"php": "^8.1",
Now run the project, and get below a bunch of errors.
Deprecated: Return type of Illuminate\Container\Container::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Container/Container.php on line 1232
Deprecated: Return type of Illuminate\Container\Container::offsetGet($key) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Container/Container.php on line 1243
Deprecated: Return type of Illuminate\Container\Container::offsetSet($key, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Container/Container.php on line 1255
Deprecated: Return type of Illuminate\Container\Container::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Container/Container.php on line 1268
Deprecated: Return type of Dotenv\Environment\AbstractVariables::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/vlucas/phpdotenv/src/Environment/AbstractVariables.php on line 162
Deprecated: Return type of Dotenv\Environment\AbstractVariables::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/vlucas/phpdotenv/src/Environment/AbstractVariables.php on line 170
Deprecated: Return type of Dotenv\Environment\AbstractVariables::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/vlucas/phpdotenv/src/Environment/AbstractVariables.php on line 178
Deprecated: Return type of Dotenv\Environment\AbstractVariables::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/vlucas/phpdotenv/src/Environment/AbstractVariables.php on line 186
Deprecated: Return type of PhpOption\None::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/phpoption/phpoption/src/PhpOption/None.php on line 118
Deprecated: Return type of Illuminate\Routing\RouteCollection::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Routing/RouteCollection.php on line 355
Deprecated: Return type of Illuminate\Routing\RouteCollection::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Routing/RouteCollection.php on line 345
Deprecated: Return type of Symfony\Component\HttpFoundation\ParameterBag::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/symfony/http-foundation/ParameterBag.php on line 213
Deprecated: Return type of Symfony\Component\HttpFoundation\ParameterBag::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/symfony/http-foundation/ParameterBag.php on line 223
Deprecated: Return type of Symfony\Component\HttpFoundation\HeaderBag::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/symfony/http-foundation/HeaderBag.php on line 282
Deprecated: Return type of Symfony\Component\HttpFoundation\HeaderBag::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/symfony/http-foundation/HeaderBag.php on line 292
Deprecated: Return type of Illuminate\Http\Request::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Http/Request.php on line 641
Deprecated: Return type of Illuminate\Http\Request::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Http/Request.php on line 655
Deprecated: Return type of Illuminate\Http\Request::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Http/Request.php on line 667
Deprecated: Return type of Illuminate\Http\Request::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Http/Request.php on line 678
Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /var/www/html/MyProject/vendor/symfony/http-foundation/Request.php on line 295
Deprecated: Return type of Illuminate\Config\Repository::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Config/Repository.php on line 141
Deprecated: Return type of Illuminate\Config\Repository::offsetGet($key) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Config/Repository.php on line 152
Deprecated: Return type of Illuminate\Config\Repository::offsetSet($key, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Config/Repository.php on line 164
Deprecated: Return type of Illuminate\Config\Repository::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/MyProject/vendor/laravel/framework/src/Illuminate/Config/Repository.php on line 175