CakePHPの初期ディレクトリ構造から、各ファイルの役割を解説する【CakePHP4】②config

<?php
/*
 * Local configuration file to provide any overrides to your app.php configuration.
 * Copy and save this file as app_local.php and make changes as required.
 * Note: It is not recommended to commit files with credentials such as app_local.php
 * into source code version control.
 */
return [
    /*
     * Debug Level:
     *
     * Production Mode:
     * false: No error messages, errors, or warnings shown.
     *
     * Development Mode:
     * true: Errors and warnings shown.
     */
    'debug' => filter_var(env('DEBUG', true), FILTER_VALIDATE_BOOLEAN),

    /*
     * Security and encryption configuration
     *
     * - salt - A random string used in security hashing methods.
     *   The salt value is also used as the encryption key.
     *   You should treat it as extremely sensitive data.
     */
    'Security' => [
        'salt' => env('SECURITY_SALT', '__SALT__'),
    ],

    /*
     * Connection information used by the ORM to connect
     * to your application's datastores.
     *
     * See app.php for more configuration options.
     */
    'Datasources' => [
        'default' => [
            'host' => 'localhost',
            /*
             * CakePHP will use the default DB port based on the driver selected
             * MySQL on MAMP uses port 8889, MAMP users will want to uncomment
             * the following line and set the port accordingly
             */
            //'port' => 'non_standard_port_number',

            'username' => 'my_app',
            'password' => 'secret',

            'database' => 'my_app',
            /*
             * If not using the default 'public' schema with the PostgreSQL driver
             * set it here.
             */
            //'schema' => 'myapp',

            /*
             * You can use a DSN string to set the entire configuration
             */
            'url' => env('DATABASE_URL', null),
        ],

        /*
         * The test connection is used during the test suite.
         */
        'test' => [
            'host' => 'localhost',
            //'port' => 'non_standard_port_number',
            'username' => 'my_app',
            'password' => 'secret',
            'database' => 'test_myapp',
            //'schema' => 'myapp',
            'url' => env('DATABASE_TEST_URL', 'sqlite://127.0.0.1/tests.sqlite'),
        ],
    ],

    /*
     * Email configuration.
     *
     * Host and credential configuration in case you are using SmtpTransport
     *
     * See app.php for more configuration options.
     */
    'EmailTransport' => [
        'default' => [
            'host' => 'localhost',
            'port' => 25,
            'username' => null,
            'password' => null,
            'client' => null,
            'url' => env('EMAIL_TRANSPORT_DEFAULT_URL', null),
        ],
    ],
];

 'Datasources' => [
        'default' => [
            'host' => 'localhost',
            /*
             * CakePHP will use the default DB port based on the driver selected
             * MySQL on MAMP uses port 8889, MAMP users will want to uncomment
             * the following line and set the port accordingly
             */
            //'port' => 'non_standard_port_number',

            'username' => 'my_app',
            'password' => 'secret',

            'database' => 'my_app',
            /*
             * If not using the default 'public' schema with the PostgreSQL driver
             * set it here.
             */
            //'schema' => 'myapp',

            /*
             * You can use a DSN string to set the entire configuration
             */
            'url' => env('DATABASE_URL', null),
        ],

//bootstrap.php：90~91行目
if (file_exists(CONFIG . 'app_local.php')) {
    Configure::load('app_local', 'default');
}

//paths.php：56行目
define('WWW_ROOT', ROOT . DS . 'webroot' . DS);

//requirements.php：23~25行目
if (version_compare(PHP_VERSION, '7.2.0') < 0) {
    trigger_error('Your PHP version must be equal or higher than 7.2.0 to use CakePHP.', E_USER_ERROR);
}