PHP。延期。呼叫现有的PHP函数

问题描述

所以我决定写一个PHP扩展。一切似乎除了我被困在一个很小的问题，要罚款。

So I decided to write an extension for php. Everything seems to be fine except I'm stuck on a tiny problem.

我的php-5.4.9 源$ C ​​$ CS。有文件转/标准/ mail.c 与真棒功能

I have php-5.4.9 source codes. There is file ext/standard/mail.c with awesome function

PHPAPI int php_mail(char *to, char *subject, char *message, char *headers, char *extra_cmd TSRMLS_DC)

在我的延长， acme.c 我有包括

...
#include "php.h"
#include "ext/standard/php_mail.h"
#include "php_ini.h"
...

所以 php_mail 感觉很好，工作正常。但是，很明显，我想用从 mail.c 的code开始在线101和189上结束（的 5-93对应的行）。所以，我回过神来的想法（这是在某些点别扭虽然）为什么不叫 PHP_FUNCTION（邮件）？到了那一刻我无法找到的宏，实际上我想知道实现这个想法的最好办法。

So php_mail feels good and works fine. But, obviously, I want to use the code from mail.c starting on line 101 and ending on 189 (http://pastie.org/5444192 5-93 corresponding lines in the paste). So I caught myself on idea (it is awkward in some point though) why not to call PHP_FUNCTION(mail)? By the moment I could not locate that macros, and actually I'd like to know the best way to implement the idea.

我内心的Zend工程师（这是新手）建议我使用call_user_function

My inner zend engineer (which is newbie) recommends me to use call_user_function

ZEND_API int call_user_function(HashTable *function_table, zval **object_pp, zval *function_name, zval *retval_ptr, zend_uint param_count, zval *params[] TSRMLS_DC);

但我无法弄清楚如何调用它。

But I can not figure it out how to call it.

问题！如何（用一个例子邮件功能非常欢迎）来调用由 PHP_FUNCTION定义函数 ？

The question! How (an example with mail function is very welcomed) to call functions defined by PHP_FUNCTION?

推荐答案

要找出一个功能是如何工作的最简单的方法是搜索它lxr.php.net。这变成了第一个例子是在readline的：http://lxr.php.net/xref/PHP_TRUNK/ext/readline/readline.c#474

The easiest way to figure out how a function works is to search for it on lxr.php.net. The first example that turns up is in readline: http://lxr.php.net/xref/PHP_TRUNK/ext/readline/readline.c#474

为邮件的使用是相似的。鉴于参数作为变量容器（ to_zval ， from_zval ， msg_zval ）调用非常简单：

The use for mail is analogous. Given the arguments as zvals (to_zval, from_zval, msg_zval) the call is very simple:

zval *params = { to_zval, from_zval, msg_zval };
zend_uint param_count = 3;
zval *retval_ptr;

zval function_name;
INIT_ZVAL(function_name);
ZVAL_STRING(&function_name, "mail", 1);

if (call_user_function(
        CG(function_table), NULL /* no object */, &function_name,
        retval_ptr, param_count, params TSRMLS_CC
    ) == SUCCESS
) {
    /* do something with retval_ptr here if you like */
}

/* don't forget to free the zvals */
zval_ptr_dtor(&retval_ptr);
zval_dtor(&function_name);

如果您没有参数变量容器已经，那么你可以使用创建它们 MAKE_STD_ZVAL 和 ZVAL_STRING

If you don't have the parameters as zvals already, then you can create them using MAKE_STD_ZVAL and ZVAL_STRING.

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