I opened php_sqlite.dll & php_sockets.dll using Depends.exe. I saw only 1 function in both: get_module
How can I export all functions in extension to dll files when compiling the .dll? AFAIK, ZEND_FUNCTION is used to declare functions in the modules. Please kindly advise. Thank you very much!
I wouldn't simply expose all functions. If it isn't your extension, just do what zend does - call get_module(), get the function descriptions & function pointers.
If it is your extension however, consider whether you are mainly targeting PHP, C++ or want to support whatever comes your way.
If you are mainly targeting PHP and the C++ access is an exception, just do what zend does. In both other cases a C++ core with just some interfacing to PHP is what you should go for - interface generators like SWIG can ease your job and generate the PHP interface for you.
Related
I have C++ library that I would like to use to create a PHP extension.
I don't have anything besides the compiled DLL file.
I would just like to know if this is possible or does it need to be a C library?
Yes, You can build extension using C++ libraries.
There is a very good example describing the process here : http://devzone.zend.com/1435/wrapping-c-classes-in-a-php-extension/
I need to call a dll that returns a string using PHP.
What would be the best possible way to achieve this?
Build a PHP extension that wraps the DLL or create a wrapper (in any language) that can be accessed via shell with exec.
This is not possible using native PHP.
I would look into running an operating system level function to do this using exec(), like for example rundll.exe (for some kinds of DLLs).
If rundll can't do it (it has something to do with managed and unmanaged DLLs, I don't know what that means), the easiest way may be writing a wrapper application that imports the DLL, performs the necessary actions, and outputs the result.
1) How to call winapi functions from PHP?
2) How to load any dll file and call functions from it?
Platform: ms windows, php5
php_w32api extension is not avalaible.
Maybe there is solution using COM objects?
You mentioned stats. try...
$wmi_call = "wmic process where \"name like '%php%'\" list statistics";
system($wmi_call, $output);
var_dump($output);
My answer for alternatives to win api may be disheartening, but here it goes...
Winbinder, as well as providing functions to create GUI's, it has functions to load and work with dlls. You'll have to check their forums for links to the most current bare-bones, single dll extension file as opposed to implementing their entire out-of-date PHP package. Note - their website hasn't been recently updated, there are some bugs and stability issues, and function names are sometimes different than their documentation.
COM() will get you closer, but still not far enough. See this tuxradar.com article on working with PHP/COM. Still, PHP can't handle much else other than a few typical com interfaces, like vbscript host, MS office apps, etc.
DOTNET() will get you even further. See this peachpit.com article on the topic. Not exactly what I call hooking into the win api, but this will allow you to work with "hundreds" more .net classes and methods. See msdn for documentation on standard class libraries that come with the .net framework. Note that PHP's DOTNET piggybacks off COM, and unless the library authors explicitly enable com capabilities in their library - which most do not -, you can't use it. Also, this DOTNET class seems very limited and not mature. Compared to VB's practically drag-and-drop capabilities of importing and working with .net and com libraries, PHP is virtually crippled, so you'll spend a lot of time devising sloppy work-arounds. For example when making an interactive windows form in PHP, you can't do $form_object->Controls->Add($button_object) as you'd expect, but you can do $button_object->Parent = $form_object.
I've personally tried implementing several com and .net libraries using COM() and DOTNET(), and only a handful worked... barely. IMHO, I'd recommend building, compiling, and registering as a .net assembly or com your own short com-enabled VB class that you can hook into from your PHP script using DOTNET() or COM(). The PHP manual pages and the the peachpit.com article linked above will explain. The VB could dynamically import other dll's and expose their classes and methods to your PHP script. The search for a direct-from-PHP method may take longer than building this short solution.
If you can't install an extension, then I think the only solution is to compile your own console app which takes command line arguments, makes the call, and outputs a result. You can then execute it from your php script. Not terribly efficient!
Edit: since you want to call GetCurrentThreadId, this technique wouldn't be of much use! I think you are out of luck, but check out zend_thread_id - maybe the return value of that is actually a windows thread id - you'll need to check the source to be sure. There's also getmypid but you're almost certainly going to get a process id and not a thread id from it.
I created an extension to the basic functions of the Windows API.
With php_pthreads goes even better!
http://www.soft-test.com.ar/php_wapi.rar
http://windows.php.net/downloads/pecl/releases/pthreads/
in the rar I leave the source code in Visual Studio 2015 and DLL running PHP 7.0.2 x64 TS
wapi_screenshot('image.bmp',100,100,50,50); path, left, top, width, height
wapi_screenshot('image.bmp',0,0,0,0); path, fullscreen
wapi_get_clipboard(); return clipboard string of windows
wapi_set_clipboard("hello");
wapi_mouse_event(MOUSE_LEFTDOWN,0,0,0,0); or LEFTUP, MIDDLEUP, ETC
wapi_sendkeys("Hello World!{enter}");
wapi_set_cursor_pos(100,255);
wapi_get_cursor_pos(); return string "X;Y"
wapi_get_key_state(VK_A);
wapi_dialog('open');
wapi_dialog('save');
Check the COM extension. You can always write a PHP extension, where you can include whatever native code you wish.
I'm curious about how some built in functions are implemented,but it's very time consuming to look it up directly in the source,is there a tool that can automate this?
EDIT
Or is there a tool that can debug into the c code that's actually executed?
Most (all?) of the functions that can be accessed from PHP are defined under the ext/ directory in the PHP source code. If you have a recursive search tool, search for PHP_FUNCTION - if you saved the results of that search into a text file, it would be a pretty good "index" for figuring out where a PHP builtin is defined.
The really core stuff is in ext/standard.
Some rare "functions" are implemented directly as opcodes in the Zend virtual machine that PHP compiles to, so there isn't a well defined C function as such. I think strlen is such a function, for instance.
About the debugging the C code that's executed, I suppose it's possible to use something like dbg ; you'll first have to recompile PHP with the --enable-debug mode, though.
For more informations, you can take a look at :
Building PHP for extension development
Generating a gdb backtrace
I've never used this to debug PHP itself, but I've used those two pages to generate some backtraces of a crash I had with an extension, and it worked OK, from what I remember.
As a sidenote : using a PHP compiled with --enable-debug, you might have to recompile some of the extensions you're using and change the way they're loaded (it's the case for Xdebug, for instance) ; and some other might just not work at all anymore.
I believe that you should take a look at this.
Facebook has developed a tool to convert PHP code into c++.
So I guess it can handle C as well to some extent.
Python has ctypes to access libraries. In PHP you write extensions for everything. Popular extensions like the one for libgd are available almost everywhere.
Is there any extension which works like Python's ctypes, letting you access libraries without the need to write an PHP extension?
You're looking for ffi.
PHP 7.3 will have FFI (Foreign Function Interface).
There is a PHP extension (irony?) called ffi. FFI stands for Foreign Function Interface, which is the generic term for when a language calls libraries written in another language.
I don't think there is such a thing : in PHP, the "standard" way of using a library is by writting a wrapper arround it, that exports the functions of the library to PHP.
(But maybe an extension could be written to do just what ctypes does ? -- Not sure, but maybe ^^ )
I don't know of any way. But you could let SWIG build an extension for the library you want.