php7에서 확장을 만드는 방법은 무엇입니까

<?phpecho say();
?>

$ php ./test.php
$ hello word

$ cd php_src/ext/
$ ./ext_skel --extname=say

$ cd ./say
$ vim ./config.m4

dnl If your extension references something external, use with:
   
 dnl PHP_ARG_WITH(say, for say support,
 dnl Make sure that the comment is aligned:
 dnl [  --with-say             Include say support])
 
 dnl Otherwise use enable:
 
 dnl PHP_ARG_ENABLE(say, whether to enable say support,
 dnl Make sure that the comment is aligned:
 dnl [  --enable-say           Enable say support])

dnl If your extension references something external, use with:
   
 dnl PHP_ARG_WITH(say, for say support,
 dnl Make sure that the comment is aligned:
 dnl [  --with-say             Include say support])
 
 dnl Otherwise use enable:
 
 PHP_ARG_ENABLE(say, whether to enable say support,
 Make sure that the comment is aligned:
 [  --enable-say           Enable say support])

PHP_FUNCTION(confirm_say_compiled)
{
        zend_string *strg;
        strg = strpprintf(0, "hello word");
        RETURN_STR(strg);
}

PHP_FE(say, NULL)

const zend_function_entry say_functions[] = {
     PHP_FE(say, NULL)       /* For testing, remove later. */
     PHP_FE(confirm_say_compiled,    NULL)       /* For testing, remove later. */
     PHP_FE_END  /* Must be the last line in say_functions[] */
 }; /* }}} */

$ phpize
$ ./configure
$ make && make install

[say]
extension = say.so