I read it's possible to use C/C++ code in PHP by writing an extension. Is there a simpler way, like wrapping magic or things like that (I must say, I heard the word, but don't know much about what a wrapper is).
Compiling a php extension isn't very hard. There is a little API to learn just like C programs has the main function and how to pass variables to the main function.
No there is not.
PHP parses PHP not C or its decendants like C++
If you want to include C code in php like some function written in C then it has to be called in an extension and it has to be compiled.
A wrapper is code around code. Most any language you use like Delphi, Vb etc. have had native code created that then calls an external API function and in the process handles any type conversion required or parameter fix up.
Among others of the same kind, tcc can be used as a C interpreter. You can install it and then, from PHP, send a C program to it :)
$output = `echo -e '#include <stdio.h>\nint main(void) { printf("Hello, World!\\n"); return 0;}' | tcc -run -`;
It's not possible to write C or C++ inside of PHP Code. The only way you can go is writing an extension for PHP. Alternatively you can take a look at HipHop-PHP which transforms any PHP code into highly optimized C++ code (it's developed by Facebook).
Depending on what you want to do, you can just compile your code into an executable file and then start it in php e.g. via the exec-function.
If that is not enough, I am afraid you'll have to look into creating an extension - but that's not as hard as it sounds if you already know c or c++.
Related
My current setup in emacs for PHP development has a variety of shortcomings. I often use a mixed mode of html and php. I want the mode to be able to recognize what context I'm in and format appropriately. I am especially interested in appropriate tabbing. This is the most important feature for me. Correct coloring would be nice, but if it messes up once in a while that's ok.
I am currently using multi-web-mode and the default php-mode in Emacs 24.3 on MacOS X.
One of the most frustrating problems is incorporating the heredoc syntax: echo <<< My current system doesn't recognize that this syntax needs to be NOT tabbed. I typically get warnings like this:
Indentation fails badly with mixed HTML/PHP in the HTML part in
plaín `php-mode'. To get indentation to work you must use an
Emacs library that supports 'multiple major modes' in a buffer.
Parts of the buffer will then be in `php-mode' and parts in for
example `html-mode'. Known such libraries are:
mumamo, mmm-mode, multi-mode
You have these available in your `load-path':
mumamo
I've already tried using mumao/nxhtml but that didn't give me the results I wanted. In some ways it was worse. I'd really appreciate any tips people have for getting a working php development environment setup for emacs.
I use web-mode (http://web-mode.org/) for mixed HTML/PHP files and php-mode for pure PHP files. The latest version of php-mode also recommended web-mode for mixed HTML/PHP files: https://github.com/ejmr/php-mode#avoid-html-template-compatibility.
Unlike other modes like mmm-mode, mumamo or multi-web-mode that try to apply different behaviors to different parts of a buffer, web-mode is aware of all the available syntax/template that can be mixed with HTML. You can also use web-mode for mixed HTML files/templates such as Twig, Django, ERB... In fact I use web-mode for anything involve HTML.
There is a catch for PHP template though: Other template systems has different file extension so it is easy to switch the mode automatically, but PHP templates usually use the same .php extension; so I have to make it switch by folders or sometimes manually invoke M-x web-mode. Here's my current configuration:
(defun add-auto-mode (mode &rest patterns)
(mapc (lambda (pattern)
(add-to-list 'auto-mode-alist (cons pattern mode)))
patterns))
(add-auto-mode 'web-mode
"*html*" "*twig*" "*tmpl*" "\\.erb" "\\.rhtml$" "\\.ejs$" "\\.hbs$"
"\\.ctp$" "\\.tpl$" "/\\(views\\|html\\|templates\\)/.*\\.php$")
BTW, try to separate your PHP files and templates and keep the mixed HTML/PHP file as simple as possible (refactor long PHP blocks into functions in a pure file). The code will be easier to read/follow.
This question is in reference to:
Free (preferably) PHP RTF to HTML converter?
I'm trying to execute that last line of code in my php:
exec(rtf2htm file.rtf file.html)
I understand what parameters need to go within the parentheses, I just do not know how to write it. I've looked at multiple examples along with the php documentation and still I remain confused, so could someone show me how it is written? rtf2htm refers to a PHP file which converts RTF to HTML.
Ultimately what I am trying to do is convert the content of numerous RTF docs to HTML, maintaining the formatting, while not creating tags such as<head> or <body> which programs like Word or TextEdit generate when converting to HTML.
rtf2htm is not a php script, it is a program installed on the server. exec() is used to call external applications.
EDIT: After looking up this script, it seems that it is indeed a php script. But it has been coded to be usable from the command line only.
This should work:
<?php
exec('php /path/to/rtf2htm /path/to/source.rtf /path/to/output.html');
?>
I am using PEAR text_diff class to get comparison of text. It works correct for plain text, but when I try to compare text with HTML tags, It gives wrong result
is there any way to compare two HTML blocks and in result display text that pre-serv its HTML and show differences like svn
In my experience, these two are fantastic:
https://github.com/cygri/htmldiff (Python)
http://www.w3.org/People/Bos/#jpegxmp (C, must be compiled)
Yes, none of the programs are written in plain PHP. You just run them via PHP:
// Python script:
$html_diff = shell_exec ('python /path/to/htmldiff version1.html version2.html');
// C program:
$html_diff = shell_exec ('/path/to/htmldiff --start-delete="<span class=\'delete\'>" --end-delete="</span>" --start-insert="<span class=\'insert\'>" --end-insert="</span>" version1.html version2.html');
Since they aren't written in PHP, you can enjoy the incredible high speed :)
I'm not sure which OS you're on, but I always use Meld on Ubuntu for diff:ing non-versioned files. It doesn't have any problems diffing HTML code (or anything else afaik):
http://meldmerge.org/
You can do this right in javascript itself. Check out google-diff-match-patch.
Diff demo here.
I would like to make something like tryruby.org. I take a line from the user (e.g., echo __FILE__) and I want to execute it in PHP and return the output back to the client.
I tried to do exec('php -r ' . $command, $output), but $output always contains the PHP help section.
How can I implement this feature?
To make php -r you have to have to put the code you want to execute between ' .. your code .. '
Example:
php -r ' $var = 34; print_r($var); '
It looks like your problem is that you aren't wrapping your code to be executed with ' '. You also need to be wary of ' in the code, special characters, escape sequences, etc.
In fact, if you insist on using exec(), it might be better to do this (to completely avoid having to worry about escaping and the such):
$command = base64_encode($command);
exec("php -r 'eval(base64_decode(\"$command\"));'", $output);
You could use eval() instead of what you're posting above.
The main issue here (both with eval() and your exec() code) is that taking PHP code from user input simply isn't safe:
The eval() language construct is very dangerous because it allows execution of arbitrary PHP code. Its use thus is discouraged. If you have carefully verified that there is no other option than to use this construct, pay special attention not to pass any user provided data into it without properly validating it beforehand.
Suggestion
Since you want to return the result of the PHP code, you could potentially do something cool with Ajax, where you pass the PHP code to a script (Base64 encoded, perhaps) as a parameter:
$code = base64_decode($_GET['code']);
// Clean the user input here
eval($code);
Ajax example using jQuery:
// assuming `code` contains the PHP code
var encoded = base64_enc(code);
$.get('execute.php?code=' + encoded, function(data) {
var result = new String(data);
// do something with the result here, such as displaying it
}, dataType='text');
For Base64 encoding in JavaScript, see this.
http://tryruby.org seems have an interactive Ruby shell. That seems to be a good starting point.
Here are two projects that provide such a shell for PHP: php_repl and phpsh.
The other part is the web interface for the interactive shell. For that part, I suggest you have a look at repl.it, which provides this service for many languages (but sadly not PHP). Here's a link to it's source code.
With this combination, you should be able to complete cour project.
Look up 'eval()' and more importantly, why eval() and what you're trying to do is very difficult to achieve in a secure manner. Imaging for example the user who inputs:
echo file_get_contents('/etc/passwd');
You'll need quite a bit of work to make this secure, including watching and filtering all system calls being made from the eval'd process.
Cheers
I'm trying to get Perl to read an offline pcap file and save the output into XML file so I can work with it in PHP.
I can't use PHP because its not my server but I can Perl. So my aim is to convert the PCAP file into XML so I have fun with it.
I have no idea where to start and have looked at the Perl Net::Pcap but I just don't understand the language.
Any ideas on what I should do?
Thank-you
Paul
Using Net::Pcap is a decent idea, although figuring out the format you'd want to write out the capture in doesn't seem all that easy. My favourite solution would be to use tshark (the command line version of wireshark) like so:
tshark -r $dmp_filename -Tpsml
This would give you the output in a XML standard format.
Of course if you don't have tshark, not very helpful...