C++ – Passing variables from PHP to C++

cjunior-programmerPHP

I need to call a program from PHP and pass some vars and/or sets of key-value pairs to it. How do I pass these vars, through arguments to the called function?

exec("/path/to/program flag1 flag2 [key1=A,key2=B]");

Or is there a better method to achieve this? Somebody suggested to me to write them into a txt file and pass the path to it to as an argument instead,

exec("/path/to/program path_to_txt_file);

but I’m not to excited about this method.

Best Answer

There are several ways that come to mind: doing Inter-Process Communication, building a C++ PHP extension/dll, or directly using the CLI.

You can have your PHP scripts take in shell parameters as you are suggesting (see https://stackoverflow.com/questions/6763997/shell-run-execute-php-script-with-parameters). You can evolve this to passing a single argument in the form of a query string, taking $argv[0] and set it to $_GET or $_POST, or whatever you prefer. Test it with something like:

<?php

parse_str($argv[0], $_POST);

Finally, for a more "correct" solution (using socket based communication), you might want to take a look at Thrift. See https://stackoverflow.com/questions/1746207/how-to-ipc-between-php-clients-and-a-c-daemon-server

Related Solutions

PHP Coding Standards – Setting $_POST Variables vs Passing Parameters in Functions

As an old-school programmer, albeit a bit out of touch now, I find this structure grotesquely unsettling - where data is passed arbitrarily all over the place. What do others think?

I, too, find this structure grotesquely unsettling. Those functions should be atomic, independent of external influences. Your examples can be called programming by coincidence and this is a horrible practice. It's unrobust code depending on side-effects and globals and will likely cause headaches for maintenance programmers. This style also effectively limits the reusability and testability of those functions, as they are so tightly coupled to a specific POST of variables (probably from the view).

This approach is by no means acceptable.

Javascript – How to passing variables from php to react.js component

You can define you element first as a const/var or whatever. Then you access the element's attributes with element.attributes and iterate through your attributes like so:

const element = document.getElementById('question');

ReactDOM.render(
    <Question {...element.attributes} />,
    element
);

You can access the attributes with this.props

If you're passing data-* attributes your can pass those with {...element.dataset}

Best Answer

Related Solutions

PHP Coding Standards – Setting $_POST Variables vs Passing Parameters in Functions

Javascript – How to passing variables from php to react.js component

Related Topic