Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:22484
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Message-ID: <00e601c64903$e56b93c0$6600a8c0@binarysecfb111>
To: <internals@lists.php.net>, "Mark Evans" <markright@gmail.com>
References: <2fd662a00603141148n1f3c6aw@mail.gmail.com> <200603142158.25640.johannes@php.net> <48.16.55982.14B59144@pb1.pair.com>
Date: Thu, 16 Mar 2006 15:14:08 +0100
MIME-Version: 1.0
Content-Type: text/plain;
	format=flowed;
	charset="utf-8";
	reply-type=response
Content-Transfer-Encoding: 7bit
Subject: Re: [PHP-DEV] PHP Embedded
From: mv-php@binarysec.com ("Michael Vergoz")

Hi,

You should understand that the current php_embed code isn't ready to be 
runned within any type of context (C context or C++ object context).
It is just a ONE Shot execution.

Have a look at : 
http://cvs.php.net/viewcvs.cgi/php-src/sapi/embed/php_embed.c?view=markup&rev=1.1.2.5.2.1
You can see that the request is destroyed at the shutdown time (should be 
your class destructor).
void php_embed_shutdown(TSRMLS_D)
{
 php_request_shutdown((void *) 0);
[..]
}

That why i have develop a different way to allow you (for example) to keep a 
PHP context within an Object.
http://www.badcode.be/~descript/PHP/php_embed/

To install it you just have to replace php_embed.c & php_embed.h from your 
sapi/embed/ .
Now i give to you an example :

class MyObject {
 public: MyObject() {
  this->ctx = php_embed_ctx_init();
  php_embed_ctx_set_var(
   this->ctx,
   PHP_EMBED_VKEY("MyObject"),
   this
  );
 };
 public: ~MyObject() {
  php_embed_ctx_fini(this->ctx);
 };
 public: execute(char *code) {
  php_embed_ctx_execute(this->ctx, code);
 };
 private: php_embed_ctx *ctx;
}

php_embed_ret my_stdout(php_embed_ctx *ctx, const char *str, uint str_l) {
 MyObject **obj;
 PHP_EMBED_LOAD_VKEY_FROM(ctx, obj, "MyObject");

 // your object is here
 // (*obj)->something

 return(PHP_EMBED_HOOK);
}

There is other useful possiblity but actualy you'll need to look my comments 
at http://www.badcode.be/~descript/PHP/php_embed/php_embed.h
I don't have many time to make more documentation. And you must to know that 
this modification isn't official so i don't have motivation to continue.

/* API */
php_embed_ctx *php_embed_ctx_init();
int php_embed_ctx_fini(php_embed_ctx *);
int php_embed_ctx_execute(php_embed_ctx *, char *);
int php_embed_ctx_add_funcs(php_embed_ctx *, zend_function_entry *);

int php_embed_ctx_set_var(php_embed_ctx *, char *, uint, void *);
int php_embed_ctx_unset_var(php_embed_ctx *, char *, uint);
void *php_embed_ctx_find_var(php_embed_ctx *, char *, uint);

/* standard output */
int php_embed_ctx_set_stdout(
	php_embed_ctx *,
	void *
);
int php_embed_ctx_unset_stdout(php_embed_ctx *);

/* flush */
int php_embed_ctx_set_flush(
	php_embed_ctx *,
	void *
);
int php_embed_ctx_unset_flush(php_embed_ctx *);

/* log output */
int php_embed_ctx_set_log(
	php_embed_ctx *,
	void *
);
int php_embed_ctx_unset_log(php_embed_ctx *);

Michael Vergoz

----- Original Message ----- 
From: "Mark Evans" <markright@gmail.com>
To: <internals@lists.php.net>
Sent: Thursday, March 16, 2006 1:34 PM
Subject: Re: [PHP-DEV] PHP Embedded


> Hi All
>
> I am back again :-)
>
> > Here one can't say much without any details (_relevant_ code and
> > backtrace)
>
> The c++ guys are still having some problems and they have given me some 
> more info..
>
> The app is init'd using the following
>
> __declspec(dllexport) void InitPHPEngine(const CString& sStartupDir)
>  {
>  static bool bInitialised = false;
>
>  if (!bInitialised)
>   {
>
>   int argc = 1;
>   char *argv[2] = {"Actinic", NULL};
>
>   php_embed_module.ub_write = ub_write;  // output is redirected to our 
> callback function
>   php_embed_module.log_message = log_message;
>   php_embed_module.sapi_error = sapi_error;
>   php_embed_module.php_ini_path_override = ".\\";
>   php_embed_init(argc, argv PTSRMLS_CC);  // init the engine
>   CString sInit = PHP_INIT_SCRIPT;
>
>   if (!sStartupDir.IsEmpty())     // if startup dir is defined
>    {
>    CString sPath;
>    sPath.Format("chdir(\"%s\");", 
> CTextUtils::MakeStringSafeForQuotedPerlFragment(sStartupDir));
>    sInit += sPath;
>    }
>
>   zend_eval_string(sInit.GetBuffer(), NULL, "main" TSRMLS_CC);
>   bInitialised = true;
>   }
>  }
>
> They then have a method
>
> BOOL PHPEvalString(const CString& sCode, zval *pzvalResult, bool 
> bExpression)
>  {
>
>  CString sPreparedCode;
>  if (bExpression)          // we should apply a trick for expressions
>   {
>   sPreparedCode.Format(_T("%s ? true : false"), sCode);
>   }
>  else
>   {
>   sPreparedCode = sCode;
>   gsPhpOutput.Empty();
>   gsPhpOutput.GetBuffer(sCode.GetLength()); // preallocate the string - 
> hopefully the result has similar length as the original script, so 
> probably that's a good guess
>   gsPhpOutput.ReleaseBuffer();     // doesn't release the extra bytes
>   }
>  char* pcScript = sPreparedCode.GetBuffer(sPreparedCode.GetLength());
>
>  zend_first_try
>   {
>   PG(during_request_startup) = 0;
>   int nResult;
>   if (bExpression)
>    {
>    nResult = zend_eval_string(pcScript, pzvalResult, "main" TSRMLS_CC);
>    }
>   else
>    {
>    nResult = zend_eval_string(pcScript, NULL, "main" TSRMLS_CC);
>    }
>
>   if (nResult == FAILURE)
>    {
>    return FALSE;
>    }
>   }
>  zend_catch
>   {
>   return FALSE;
>   }
>  zend_end_try();
>
>  return TRUE;
>  }
>
> Therefore they want to shut down the request after the line
>
> nResult = zend_eval_string(pcScript, NULL, "main" TSRMLS_CC);
>
> and restart it for the next call
>
> But doing
>
>    nResult = zend_eval_string(pcScript, NULL, "main" TSRMLS_CC);
>    TSRMLS_FETCH();
>    php_request_shutdown(NULL);
>    php_request_startup(TSRMLS_C);
>
> Causes an immediate crash when it reaches php_request_startup(TSRMLS_C); 
> :(
>
> Also because init, eval and shutdown are in separate functions tsrm_ls is 
> defined as static in the app.
>
> The also sent me the following backtrace if its of any use..
>
> php4ts.dll!00d45b61()
>   php4ts.dll!00d45622()
>   user32.dll!77d6ebe2()
>   php4ts.dll!00d43e16()
> > ActPHPRunner.dll!PHPEvalString(const
> ATL::CStringT<char,StrTraitMFC_DLL<char,ATL::ChTraitsCRT<char> > > & 
> sCode={...}, _zval_struct * pzvalResult=0x0012e558, bool 
> bExpression=false)  Line 372 + 0x7c C++
>
> Any advice is greatly appreciated.
>
> Regards
>
> Mark
>
> -- 
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>