PHP AI Tool Bridge is a flexible PHP framework designed to abstract away the complexity of interacting with various AI and large language model APIs. By defining a standard AiTool interface, it allows developers to switch between providers such as OpenAI, Azure OpenAI, and Hugging Face without modifying business logic. The library includes support for prompt templates, parameter configuration, streaming, function calls, request caching, and logging. It also features a tool execution pattern that enables chaining multiple AI tools, building conversational agents, and managing state through memory stores. PHP AI Tool Bridge accelerates the development of AI-powered features by reducing boilerplate and ensuring consistent API usage.