how to capture output from interactive program

@NogDogFeb 03.2012 — #Usually you can redirect command line output to a file with the ">" operator, e.g.:

<i>
 </i>php my_script.php arg1 arg2 &gt; results.txt

@jeanlucaauthorFeb 03.2012 — #No thats not what I mean.I think you can compare what I need to do with using mysql client. To get data out of this tool you need to open it, feed it a SELECT statement and capture the output.

I noticed that proc_open can do bi-directional stuff. Here is my test script I made using the manual from proc_open

[CODE]<?php
 $descriptorspec = array(
 0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
 1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
 2 => array("file", "/tmp/error-output.txt", "a") // stderr is a file to write to
 );
 
 $cwd = './src';
 $env = array();
 
 $process = proc_open('./stockfish', $descriptorspec, $pipes, $cwd, $env);
 
 if (is_resource($process)) {
 
  fwrite($pipes[0], "position fen rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1ngo depth 20");
  fclose($pipes[0]);
 
  echo stream_get_contents($pipes[1]);
  fclose($pipes[1]);
 
  $return_value = proc_close($process);
 
  echo "command returned $return_valuen";
 }
 ?>
 [/CODE]

But it doesn't print all the output, I think it print only the last line.

UPDATE: it seems that the program ignores the second argument given ("go depth 20"). So, the line printed by strem_get_contents is the line I need!

UPDATE2: the second argument is not ignored but I get the same result as when I would only provide "go" instead of "go depth 20".

how to capture output from interactive program

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