Providing input to php script when launched through java application -

i need run php script through java application , give input based on questions.

i found stream_get_line or fgets hangs every time send input.

this not happen other applications (for example if execute xcopy).

i have tried lot of approaches (most of them visible in code below), main suspicion might encoding (or stream_get_line , fgets in php has bug). help?

since actual php script third party, cannot change it.

php code

<?php  $tty = os_windows ? @fopen('\con', 'r') : @fopen('/dev/tty', 'r'); $myfile = fopen("c:\\temp\\tty_try.php.txt", "w") or die("unable open file!"); echo "internal encoding:", mb_internal_encoding(), "\r\n"; //<=== gives utf-8 print "enter something: "; fwrite($myfile, "going wait input..."); $tmp = stream_get_line($tty, 10, php_eol); //fgets($tty); //, 1024); //when launched through java application following statements never executed echo "encoding of output:", mb_detect_encoding($tmp), "\r\n";//<=== gives ascii fwrite($myfile, "got input: ");          fwrite($myfile, $tmp);           echo "and answer is: |", $tmp, "|"; fclose($myfile);  ?> 

java code

    private void testinputtophpcommand() {     try {         process process = runtime.getruntime().exec("c:\\php\\php.exe c:\\temp\\tty_try.php");         outputstream stdin = process.getoutputstream();         inputstream stdout = process.getinputstream();          bufferedreader reader = new bufferedreader(new inputstreamreader(stdout));         bufferedwriter writer = new bufferedwriter(new outputstreamwriter(stdin));          bufferedwriter out = new bufferedwriter                 (new outputstreamwriter(stdin,                         //standardcharsets.utf_16));                         //standardcharsets.us_ascii));                         standardcharsets.utf_8));          string line = "";         int read = 0;         char [] buf = new char[256];         while(-1 != (read = reader.read(buf))) {             line = new string(buf, 0, read);             if (line.endswith("enter something: ")) {                 string newline = system.getproperty("line.separator");                 //byte[] bytes = newline.getbytes("us-ascii");                 byte[] bytes = newline.getbytes("utf-8");                  //out.newline();                 //stdin.write(bytes);                 //stdin.close();                  //string input = new string(bytes, "us-ascii");                 string input = new string(bytes, "utf-8");                 out.write(input);                 out.close();                  /*                 out.write("\\h");                 out.newline();                 out.flush();                 out.write("\\q");                 out.newline();                 out.flush();                 */              }         }          process.waitfor();      }  catch (ioexception | interruptedexception e) {         // todo auto-generated catch block         e.printstacktrace();     }  }