commandLineTools.php

<?php

function getEval($fenPosition, $movetime, $uciEnginePath = "/Volumes/Extra\ Stuff/Dev/ChessDatabase/stockfish-3-mac/Mac/stockfish-3-32"){
    $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 = '/tmp';
    $env = array('some_option' => 'aeiou');

    $process = proc_open("$uciEnginePath", $descriptorspec, $pipes, $cwd, $env);

    if (is_resource($process)) {

        fwrite($pipes[0], "uci\n");
        fwrite($pipes[0], "ucinewgame\n");
        fwrite($pipes[0], "isready\n");
        fwrite($pipes[0], "position fen $fenPosition\n");
        fwrite($pipes[0], "go movetime $movetime\n");
        usleep(1000 * $movetime);
        fclose($pipes[0]);

        preg_match_all("/cp (-?[0-9]*?)(?= )/", stream_get_contents($pipes[1]), $matches);

        preg_match("/-?[0-9]+/", end($matches[0]), $output);

        fclose($pipes[1]);
    }
    return $output[0];
}

function getEvalBulk($fenPositions, $movetime, $uciEnginePath = "/Volumes/Extra\ Stuff/Dev/ChessDatabase/stockfish-3-mac/Mac/stockfish-3-32"){
    foreach ($fenPositions as $key => $fenPosition) {
        $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 = '/tmp';
        $env = array('some_option' => 'aeiou');

        $process = proc_open("$uciEnginePath", $descriptorspec, $pipes, $cwd, $env);

        if (is_resource($process)) {

            fwrite($pipes[0], "uci\n");
            fwrite($pipes[0], "ucinewgame\n");
            fwrite($pipes[0], "isready\n");
            fwrite($pipes[0], "position fen $fenPosition\n");
            fwrite($pipes[0], "go movetime $movetime\n");
            usleep(1000 * $movetime);
            fclose($pipes[0]);

            preg_match_all("/cp (-?[0-9]*?)(?= )/", stream_get_contents($pipes[1]), $matches);

            //print_r(end($matches[0]));

            preg_match("/-?[0-9]+/", end($matches[0]), $output);

            //print_r($output);

            $eval[$key] = $output[0];

            fclose($pipes[1]);
        }
    }
    return $eval;
}

function extractFENPositions($pgnFile, $stripCounter = TRUE, $pgnExtractPath = "./../pgn-extract/pgn-extract"){
    $fen = shell_exec("$pgnExtractPath --fencomments -s ".$pgnFile);

    preg_match_all("/\{(\n|\r|.)*?\}/", $fen, $fenTemp);

    $matches = array("/\n/", "/({ )|( })/");
    $replaces = array(" ", "");

    $output = array();

    foreach($fenTemp[0] as $value){

        $value = preg_replace($matches, $replaces, $value);

        if($stripCounter == TRUE){
            $value = explode(" ", $value);
            array_pop($value);
            array_pop($value);
            array_pop($value);
            $value = implode(" ", $value);
        }


        $output[] = $value;
    }

    return $output;
}

function extractPGNHeader($pgn){
    //$pgn = file_get_contents($pgnFile);

    preg_match_all("/\[.*?\]/", $pgn, $matches);

    $output = array();

    foreach ($matches[0] as $key => $value) {
        preg_match("/(?<=\[).*?(?= )/", $value, $title);
        preg_match("/(?<=\").*?(?=\")/", $value, $data);

        $output[$title[0]] = $data[0];
    }

    return $output;
}

function extractPGNMoves($pgn){
    //$pgn = file_get_contents($pgnFile);

    $match = array("/\[.*?\]/", "/\n|\r/", "/\. /", "/\(.*?\)/", "/\{.*\}/");
    $replace = array("", " ", ".", "", "");

    $pgn = explode(" ", trim(preg_replace($match, $replace, $pgn)));

    array_pop($pgn);

    foreach ($pgn as $key => $value) {
        if(empty($value)){
            unset($pgn[$key]);
        }
    }

    $pgn = array_values($pgn);

    return $pgn;
}

$pgnExtractPath = "./../pgn-extract/pgn-extract";
$uciEnginePath = "/Volumes/Extra\ Stuff/Dev/ChessDatabase/stockfish-3-mac/Mac/stockfish-3-32"; //absolute path to uci engine
$movetime = 500; //thousandths of a second

/*
$pgnFile = "test.pgn";
$pgnHeader = extractPGNHeader($pgnFile);
$pgnMoves = extractPGNMoves($pgnFile);
$fenPositions = extractFENPositions($pgnFile, $pgnExtractPath, TRUE);
$evaluations = getEvalBulk($fenPositions, $movetime, $uciEnginePath);
*/