PHP-CPP是一个用于开发PHP扩展的C++库。它提供了一套详实易用的类，用于开发PHP扩展。详细文档说明：http://www.php-cpp.com

示例1：

Php::Value hello_world(){
    return "hello world!";}

示例2：

#include 

/**
 *  Global variable that stores the number of times 
 *  the function updateCounters() has been called in total
 *  @var    int
 */
int invokeTotalCount = 0;

/**
 *  Global variable that keeps track how many times the
 *  function updateCounters() was called during the
 *  current request
 *  @var    int
 */
int invokeDuringRequestCount = 0;

/**
 *  Native function that is callable from PHP
 *
 *  This function updates a number of global variables that count
 *  the number of times a function was called
 */
void updateCounters()
{
    // increment global counters
    invokeTotalCount++;
    invokeDuringRequestCount++;
}

/**
 *  Switch to C context, because the Zend engine expects get get_module()
 *  to have a C style function signature
 */
extern "C" {
    /**
     *  Startup function that is automatically called by the Zend engine
     *  when PHP starts, and that should return the extension details
     *  @return void*
     */
    PHPCPP_EXPORT void *get_module() 
    {
        // the extension object
        static Php::Extension extension("my_extension", "1.0");
        
        // install a callback that is called at the beginning 
        // of each request
        extension.onRequest([]() {
            
            // re-initialize the counter
            invokeDuringRequestCount = 0;
        });
        
        // add the updateCounter method to the extension
        extension.add("updateCounters", updateCounters);
        
        // return the extension details
        return extension;
    }
}

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