php error display configuration

Warning: Never display any error messages in a production environment! (Recommended learning: PHP video tutorial)

Display errors (display_errors) and error reporting (error_reporting) are two different things. When an error occurs in a PHP script, you can choose whether to report the error (record it in the error log) according to the settings. If display_errors is turned on in the settings, the error message will be printed to the screen at the same time.

Commonly used settings in projects

switch (ENVIRONMENT)
{
    // 对于开发环境，报告所有错误，同时显示到屏幕上
    case 'development':
        error_reporting(-1);
        ini_set('display_errors', 1);
    break;

    // 对于测试和生产环境，不显示错误，5.3 以上的版本，不报告通知、废弃方法、严格这几类错误
    case 'testing':
    case 'production':
        ini_set('display_errors', 0);
        if (version_compare(PHP_VERSION, '5.3', '>='))
        {
            error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED & ~E_STRICT & ~E_USER_NOTICE & ~E_USER_DEPRECATED);
        }
        else
        {
            error_reporting(E_ALL & ~E_NOTICE & ~E_STRICT & ~E_USER_NOTICE);
        }
    break;

    default:
        header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
        echo 'The application environment is not set correctly.';
        exit(1); // EXIT_ERROR
}

Modify the php.ini configuration file

error_reporting = E_ALL # 报告所有错误
display_errors = On # 显示错误

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