【发布时间】：2022-01-22 07:38:55
【问题描述】：
今天我将 xampp 中的 php 更新为 8.1.0，之后所有 Laravel 项目都停止在 localhost 中。
所以，在将 composer.json 从更新到
"php": "^7.3|^8.0",
在运行 composer update 或任何 composer 命令后，我看到 composer 有这样的问题：
PHP Deprecated: Return type of Symfony\Component\Console\Helper\HelperSet::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/symfony/console/Helper/HelperSet.php on line 112
Deprecated: Return type of Symfony\Component\Console\Helper\HelperSet::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/symfony/console/Helper/HelperSet.php on line 112
Deprecation Notice: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/Constraint.php:48
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Repository/ArrayRepository.php:277
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Repository/ArrayRepository.php:277
Deprecation Notice: Return type of Composer\Repository\ArrayRepository::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Repository/ArrayRepository.php:277
Deprecation Notice: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/Constraint.php:48
Deprecation Notice: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/Constraint.php:48
Deprecation Notice: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/Constraint.php:48
我该如何解决这个问题，因为作曲家有错误，我的所有项目都停止了。
【问题讨论】：
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为什么会这样？ Laravel 7 不支持 PHP 8，并且是在它之前编写的。
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你在哪里看到 Laravel 7 兼容 PHP 8.1？
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好吧，如果你想使用 PHP 8，你需要使用兼容的 Laravel 版本。
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@BrianThompson Laravel 7（和 6）仍受支持。规范
^7.3|^8.0表示它适用于 8.1。 -
你需要更新作曲家；错误消息显然来自
composer.phar。就做composer selfupdate
标签： php laravel composer-php php-8.1