PHP extension development: How to integrate custom functions with third-party libraries?

In PHP extension development, you can integrate custom functions with third-party libraries through the following steps: install third-party libraries; load third-party libraries in the extension; declare custom functions; integrate the API of third-party libraries; return results .

PHP extension development: Integrate custom functions with third-party libraries

In PHP extension development, integrate custom functions Integration with third-party libraries can greatly enhance the usefulness of extensions. This article will guide you on how to integrate custom functions with third-party libraries, as well as practical case descriptions.

Understand the prerequisites

Before you begin, you need to understand the following prerequisites:

• Familiar with PHP extension development (writing .so file)
• Be familiar with the API of the selected third-party library

Integration steps

1. Install third-party libraries:
   Use Composer or other dependency managers to install third-party libraries.
2. Load third-party libraries:
   To load third-party libraries in an extension, you can use the zend_extension_load() function or manually load the file.
3. Declare a custom function:
   Use zend_declare_function() or zend_internal_function() to declare a custom function.
4. Integrate the API of third-party libraries:
   In the custom function, call the API function or method of the third-party library, and pass the necessary data through function parameters.
5. Return results:
   Use RETURN_XXX to declare a return of built-in type values ​​(such as Boolean, integer, etc.), or use RETURN_OBJ to return A Zend object (such as a Zend array or class).

Practical case: Integrating the Guzzle library

Suppose we want to integrate the Guzzle library in our PHP extension to make HTTP requests. The following are the integration steps:

#include <Zend/zend_API.h>
#include <zend_exceptions.h>
#include <ext/standard/php_standard.h>
#include "guzzle.h" // 假设guzzle.h包含了Guzzle库的API声明

extern zend_class_entry *guzzle_client_ce;

ZEND_METHOD(GuzzleClient, request) {
  zval *url, *method, *data; // 函数参数
  guzzle_client *client = (guzzle_client *) Z_OBJ_P(ZEND_THIS);

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "sss", &url, &method, &data) == FAILURE) {
    RETURN_NULL();
  }

  // 构建Guzzle请求并执行
  guzzle_request *request = guzzle_request_new();
  guzzle_request_set_url(request, Z_STRVAL_P(url));
  guzzle_request_set_method(request, Z_STRVAL_P(method));
  if (Z_TYPE_P(data) == IS_STRING) {
    guzzle_request_set_body(request, Z_STRVAL_P(data), -1);
  }
  guzzle_response *response = guzzle_client_request(client->guzzle_client, request);

  // 处理响应并返回结果
  if (!guzzle_response_ok(response)) {
    zend_throw_exception(guzzle_client_ce, "HTTP error", guzzle_response_status(response));
    RETURN_NULL();
  }

  RETURN_OBJ(guzzle_response_body(response));
}

In the above example, we defined a GuzzleClient class and implemented the request() method. This method accepts URL, method and data as parameters, uses the Guzzle library to perform HTTP requests and returns the response body.

Notes

• Ensure that exceptions thrown by third-party libraries are correctly handled in custom functions.
• It is recommended to use the zend_error_handling macro or the zend_try block to handle exceptions and errors.
• If a third-party library uses resources, make sure to release the resources before returning to the custom function.

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