symfony/validator
Validator
该库是一个 PHP 框架，用于通过根据预定义约束验证标量值和复杂对象结构来强制执行数据完整性和业务规则。它提供了一种检查对象图和属性元数据的结构化方法，确保数据在被应用处理之前符合预期要求。
该框架的特色在于元数据驱动的映射系统，它使用反射或配置文件将规则直接应用于对象属性。它支持上下文规则编排，允许开发者将约束组织成逻辑组，根据应用状态或数据生命周期有选择地触发。该系统还采用基于访问者的遍历模式来检查复杂对象结构，并使用惰性加载仅在需要时实例化验证规则。
除了核心验证外，该库还包括用于数据格式化、时间比较和输入清理的实用程序。它具有解耦的架构，将约束定义与执行逻辑分离开来，从而能够创建可重用的、特定于领域的规则。错误处理通过翻译抽象层进行管理，该层将违规结果映射为本地化消息，以实现国际化的报告。
Features
- Data Validation - Validates values and object properties against predefined rule sets to ensure compliance with business logic.
- PHP Validation Libraries - Provides a comprehensive framework for enforcing data integrity and business rules through constraint-based validation in PHP applications.
- Data Validation - Ensures incoming data and complex objects conform to business rules and structural requirements before processing.
- Object Constraint Validation Engines - Implements a structured engine for validating complex object graphs and property metadata against predefined business rules.
- Constraint Mappings - Uses reflection and configuration to map validation rules directly onto object properties for automated integrity checks.
- Custom Logic Validation - Enables the creation of reusable, domain-specific validation logic that can be applied to any data structure.
- Data Validation Libraries - Checks individual scalar values against defined constraints to ensure they meet specific format or value requirements.
- Format Validation Rules - Validates input data against specific patterns like cron expressions or structured markup to ensure format compliance.
- Structural Data Validators - Inspects properties and states of complex objects to ensure data integrity and consistency within the application model.
- Domain-Specific Validation Rules - Orchestrates validation logic into groups that trigger selectively based on the data lifecycle or application state.
- Validation Message Localization - Routes validation failure messages through a localization layer to provide multi-language support for error reporting.
- Data Structure Traversers - Implements visitor-based traversal to inspect complex object graphs and delegate validation logic to specific handlers.
- Validation Grouping - Organizes validation rules into logical sets that trigger selectively based on the application state.
- Validation Logic Decoupling - Separates validation rules from domain entities to maintain clean, testable, and reusable validation logic.
- Input Sanitizers - Provides robust input sanitization utilities to ensure user-provided data conforms to security and format constraints.
