How do I block and read to the end?

I think about the combination

• stream_select and / or feof ()
• fread () and partial result concatenation ($ result. = fread ())
• and maybe proc_get_status () to determine the end of the process

Do you want to wait for the tcl application to write something to its stdout for a certain amount of time (assuming this means the end of the last command) and then send the next command / line to its stdin?

Edit:
It seems like you can send all the commands to the tcl shell at once and they are processed one by one, i.e. the shell reads the next line of input / command when it runs with the previous one. I have verified this with a script.

incr a 1
after 1000
puts [concat [clock seconds] $a]

      

        
        
        
      

    

and

<?php
$app = 'c:/programme/tcl/bin/tclsh85.exe';
$descriptorspec = array(
  0 => array("pipe","r"),
  1 => array("pipe","w"),
  2 => array("file","C:/god.txt","w")
) ;
$process = proc_open($app, $descriptorspec, $pipes);
if (is_resource($process)) {
  fwrite($pipes[0], "set a 1\n");
  for($i=0;$i<4;$i++) {
    fwrite($pipes[0], "source c:/helloworld.tcl\n");
  }
  // when all scripts are done the shell shall exit
  fwrite($pipes[0], "exit\n");
  fclose($pipes[0]);

  do {
    $read=array($pipes[1]); $write=array(); $except=array($pipes[1]);
    // wait up to 1 second for new output of the tcl process
    $ready = stream_select($read, $write, $except, 1, 0);
    if ( $ready && $read /* is not empty */) {
      // get the partial output
      $r = fread($pipes[1], 2048);
      echo $r;
    }
    // is the process still running?
    $status = proc_get_status($process);
  } while($status['running']);
  fclose($pipes[1]);
  proc_close($process);
}
?>

      

        
        
        
      

    

You probably want to add some more bug. For example. if stream_select () returns x times with a timeout, something might have gone wrong.

edit2:
Let the shell print what you can scan after each script.

<?php
// something that not in the "normal" output of the scripts
$id = 'done'. time();

$app = 'c:/programme/tcl/bin/tclsh85.exe';
$descriptorspec = array(
  0 => array("pipe","r"),
  1 => array("pipe","w"),
  2 => array("file","C:/god.txt","w")
) ;
$process = proc_open($app, $descriptorspec, $pipes);
if (is_resource($process)) {
  fwrite($pipes[0], "set a 1\n");
  for($i=0;$i<4;$i++) {
    $output = '';
    $continue = true;
    $cTimeout = 0;
    echo 'loop ', $i, "\n";
    fwrite($pipes[0], "source c:/helloworld.tcl\n");
    fwrite($pipes[0], "puts $id\n");
    echo "waiting for idle\n";
    do {
      $read=array($pipes[1]);
      $write=array();
      $except=array($pipes[1]);
      $ready = stream_select($read, $write, $except, 1, 0);
      if ( $ready && $read ) {
        $output .= fread($pipes[1], 2048);
        // if the delimiter id shows up in $output
        if ( false!==strpos($output, $id) ) {
            // the script is done
          $continue = false;
        }
      }
    } while($continue);
    echo 'loop ', $i, " finished\n";
  }
  proc_close($process);
}
?>