Edit file File name : composer.json Content :{ "name": "ralouphie/getallheaders", "description": "A polyfill for getallheaders.", "license": "MIT", "authors": [ { "name": "Ralph Khattar", "email": "ralph.khattar@gmail.com" } ], "require": { "php": ">=5.6" }, "require-dev": { "phpunit/phpunit": "^5 || ^6.5", "php-coveralls/php-coveralls": "^2.1" }, "autoload": { "files": ["src/getallheaders.php"] }, "autoload-dev": { "psr-4": { "getallheaders\\Tests\\": "tests/" } } } Save