PHP和C ++之间的通信

Question

I want to communicate PHP and C++ code.

I need to pass a big JSON between them. The problem is that I am currently using "passthru", but for some reason I do not know, the C ++ code does not receive the entire parameter, but is cut in 528 characters when the JSON is 3156.

By performing tests, I have been able to verify that the "passthru" command supports as many characters as 3156. But I do not know if there is a maximum input parameter size in C ++.

The PHP application is as follows:

passthru('programc++.exe '.$bigJSON, $returnVal);

The C++ application:

int main(int argc, char* argv[]){
  char *json = argv[1];
}

Is there any way to fix the problem? I have read about PHP extensions and IPC protocols, but the problem is that I have to do a multiplatform program (I must have a version for Windows, another for Linux and for Mac). And I think that using PHP extensions and IPC protocols (as far as I could read) complicates things quite a bit.

Answer 1

Solution: The solution is use "proc_open" and use the pipe stdin and stdout. In my case, I use the library rapidjson. I add double quotes in PHP in order to rapidJSON works and process the JSON. PHP:

$exe_command = 'program.exe';

$descriptorspec = array(
    0 => array("pipe", "r"),  // stdin
    1 => array("pipe", "w"),  // stdout -> we use this
    2 => array("pipe", "w")   // stderr 
);

$process = proc_open($exe_command, $descriptorspec, $pipes);
$returnValue = null;
if (is_resource($process)){
    fwrite($pipes[0], $bigJSON);
    fclose($pipes[0]);

    $returnValue = stream_get_contents($pipes[1]);
    fclose($pipes[1]);
}

C++:

int main(int argc, char* argv[]){
    std::string json;
    std::getline (std::cin, json);
    cout << json << endl; // The JSON
}