The YAML Format The YAML Format Scalars Strings Numbers Nulls Booleans Dates Collections Comments Explicit Typing Unsupported YAML Features The YAML Format The YA...

How to Create a Form Type Extension How to Create a Form Type Extension Defining the Form Type Extension Registering your Form Type Extension as a Service Adding the extension B...

NotNull NotNull Basic Usage Options groups message payload NotNull NotNull Validates that a value is not strictly equal to null . To ensure that a value is not blan...

The VarExporter Component The VarExporter Component Installation Exporting/Serializing Variables Instantiating PHP Classes The VarExporter Component The VarExporter Compone...

How to Work with Form Themes How to Work with Form Themes Symfony Built-In Form Themes Applying Themes to all Forms Applying Themes to Single Forms Applying Multiple Themes to S...

How to Use the Serializer Installation Using the Serializer Service Adding Normalizers and Encoders Using Serialization Groups Annotations Configuring the Metadata Cache Enabl...

Workflows and State Machines Workflows and State Machines Workflows Examples State Machines Example Automatic and Manual Validation Workflows and State Machines Workfl...

The PHPUnit Bridge Installation Usage Running Tests in Parallel Trigger Deprecation Notices Mark Tests as Legacy Configuration Making Tests Fail Internal deprecations Direct ...

基础相关配置 正式参数（Canonical Parameters） 程序级别的配置 常量 v.s. 配置选项 语义化配置：禁止使用 将敏感配置项全部移出Symfony 配置信息通常被细分到程序的不同部分（比如基本信息和安全凭证）和不同的环境（开发环境、生产环境）。这就是为何Symfony推荐你将程序配置分为三部分的原因。 基础相关配置 B...

IsFalse IsFalse Basic Usage Options groups message payload IsFalse IsFalse Validates that a value is false . Specifically, this checks to see if the value is exactl...