优化 Composer 自动加载，执行命令：composer dumpautoload -o，提示：Deprecation Notice:does not comply with psr-0 autoloading stan ard. It will not autoload anymore in Composer v2.0. 的分析

1、优化 Composer 自动加载，执行命令：composer dumpautoload -o，提示：Deprecation Notice:does not comply with psr-0 autoloading stan
ard. It will not autoload anymore in Composer v2.0.如图1

图1

PS E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload> composer dumpautoload -o
Generating optimized autoload files
Deprecation Notice: Class HTMLPurifier_Language_en_x_test located in E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Language/classes/en-x-test.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201
Deprecation Notice: Class Flow/JSONPath/Test/JSONPathArrayAccessTest located in E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload/vendor/flow/jsonpath/tests/JSONPathArrayAccessTest.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201
Deprecation Notice: Class Flow/JSONPath/Test/JSONPathBenchmarks located in E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload/vendor/flow/jsonpath/tests/JSONPathBenchmarks.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201
Deprecation Notice: Class Flow/JSONPath/Test/JSONPathDashedIndexTest located in E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload/vendor/flow/jsonpath/tests/JSONPathDashedIndexTest.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201
Deprecation Notice: Class Flow/JSONPath/Test/JSONPathLexerTest located in E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload/vendor/flow/jsonpath/tests/JSONPathLexerTest.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201
Deprecation Notice: Class Flow/JSONPath/Test/JSONPathSliceAccessTest located in E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload/vendor/flow/jsonpath/tests/JSONPathSliceAccessTest.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201
Deprecation Notice: Class Flow/JSONPath/Test/JSONPathTest located in E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload/vendor/flow/jsonpath/tests/JSONPathTest.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201
Deprecation Notice: Class Flow/JSONPath/Test/JSONPathTestClass located in E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload/vendor/flow/jsonpath/tests/JSONPathTest.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar://C:/ProgramData/ComposerSetup/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201
Generated optimized autoload files containing 3053 classes

2、翻译之后，弃用通知：类不符合 psr-0 自动加载标准。在 Composer v2.0 中将不再自动加载。不过，现在 Composer 的版本是：Composer version 1.10.6，暂时可以不用理会。如图2

图2

PS E:/wwwroot/pcs-api-feature-php-7.4-dumpautoload> composer -V
Composer version 1.10.6 2020-05-06 10:28:10

3、文件 vendor/composer/autoload_classmap.php、vendor/composer/autoload_static.php 重新生成，各自添加了 2000 余行。如图3

图3

4、这些是警告和注意，没有错误。仍然可以继续使用。如果后期 Composer 升级至 2.0 后，需要想办法删除或者升级不符合 psr-0 自动加载标准的类库了。