rock paper scissors with various options, file functionality

rps_final_file.php

<?php

$choices = array('r', 'p', 's');
$start = microtime(true);
$wins = 0;
$draws = 0;
$losses = 0;
$prandom = true;

// Get input
$input = getopt('rpshdg:o::f:', array('rock', 'paper', 'scissors', 'help', 'long', 'short', 'delete', 'games:', 'file:'));

// Help Menu
if (array_key_exists('help', $input) || array_key_exists('h', $input) || empty($input)) {
    echo "\n                HELP MENU\nSHORT       LONG                DESCRIPTION\n-h        --help        Display this text.\n-g        --games       Choose number of games (1 by default.)\n-r        --rock        Choose rock for every game (random by default.)\n-p        --paper       Choose paper for every game (random by default.)\n-s        --scissors    Choose scissors for every game (random by default.)\n-o        --outcomes    Display outcome messages (slows program down.)\n-ol       --long        Display long outcome messages (slows program down.)\n-d        --delete      Delete contents of output file (reset game history.)\n-w        --write       Write to the output file.\n-f        --file        Set name of output file, will create if non-existent ('results.txt' by default.)\n\n";
    exit;
}

// Get number of games
if (array_key_exists('games', $input) && $input['games'] >= 1) {
        $gamenumber = $input['games'];
} elseif (array_key_exists('g', $input) && $input['g'] >= 1){
        $gamenumber = $input['g'];
} else {
    $gamenumber = 1;
}

// Get output filename
if (array_key_exists('file', $input) && !empty($input['file'])) {
    if (!array_key_exists('o', $input) && !array_key_exists('short', $input) && !array_key_exists('long', $input)) {
        echo "Enable output for file writing.\n";
    }
    $filename = $input['file'];
} elseif (array_key_exists('f', $input) && !empty($input['f'])){
    if (!array_key_exists('o', $input) && !array_key_exists('short', $input) && !array_key_exists('long', $input)) {
        echo "Enable output for file writing.\n";
    }
    $filename = $input['f'];
} else {
    $filename = "results.txt";
}
$file = fopen($filename, 'a');


// Output results
function output($pchoice, $cchoice, $op, $point, $file) {
    echo "$pchoice $op $cchoice, $point\n";
    fwrite($file, "$pchoice $op $cchoice, $point\n");
}

function outcomeLong($player, $computer, $file) {
    switch ([$player, $computer]) {
        case ['r', 'r']:
            output('Rock', 'Rock', 'is the same as', 'draw!', $file);
            return 'draws';
        case ['r', 'p']:
            output('Rock', 'Paper', 'is covered by', 'you lose!', $file);
            return 'loses';
        case ['r', 's']:
            output('Rock', 'Scissors', 'smashes', 'you win!', $file);
            return 'wins'; 
        case ['p', 'r']:
            output('Paper', 'Rock', 'covers', 'you win!', $file);
            return 'wins'; 
        case ['p', 'p']:
            output('Paper', 'Paper', 'is the same as', 'draw!', $file);
            return 'draws';
        case ['p', 's']:
            output('Paper', 'Scissors', 'is cut by', 'you lose!', $file);
            return 'loses'; 
        case ['s', 'r']:
            output('Scissors', 'Rock', 'is smashed by', 'you lose!', $file);
            return 'loses'; 
        case ['s', 'p']:
            output('Scissors', 'Paper', 'cuts', 'you win!', $file);
            return 'wins'; 
        case ['s', 's']:
            output('Scissors', 'Scissors', 'is the same as', 'draw!', $file);
            return 'draws';
        default:
            echo 'INVALID COMBINATION';
            echo "\n";
    }
}

function outcomeShort($player, $computer, $file){
    switch ([$player, $computer]) {
        case ['r', 'r']:
            output('R', 'R', '=', '+0', $file);
            return 'draws';
        case ['r', 'p']:
            output('R', 'P', '<', '-1', $file);
            return 'loses';
        case ['r', 's']:
            output('R', 'S', '>', '+1', $file);
            return 'wins';
        case ['p', 'r']:
            output('P', 'R', '>', '+1', $file);
            return 'wins';
        case ['p', 'p']:
            output('P', 'P', '=', '+0', $file);
            return 'draws';
        case ['p', 's']:
            output('P', 'S', '<', '-1', $file);
            return 'loses';
        case ['s', 'r']:
            output('S', 'R', '<', '-1', $file);
            return 'loses';
        case ['s', 'p']:
            output('P', 'S', '>', '+1', $file);
            return 'wins';
        case ['s', 's']:
            output('S', 'S', '=', '+0', $file);
            return 'draws';
        default:
            echo 'INVALID COMBINATION';
            echo "\n";         
    }
}

// Evaluate and output results
function getResults($player, $computer, $input, $file){
    if (array_key_exists('o', $input)){
        switch ($input['o']){
            case 'l':
                return outcomeLong($player, $computer, $file);
            default:
                return outcomeShort($player, $computer, $file);
        }
    } elseif (array_key_exists('long', $input)) {
        return outcomeLong($player, $computer, $file);
    } elseif (array_key_exists('short', $input)) {
        return outcomeShort($player, $computer, $file);
    } else {
        switch ([$player, $computer]) {
            case ['r', 'r']:
                return 'draws';
            case ['r', 'p']:
                return 'loses';
            case ['r', 's']:
                return 'wins'; 
            case ['p', 'r']:
                return 'wins'; 
            case ['p', 'p']:
                return 'draws';
            case ['p', 's']:
                return 'loses'; 
            case ['s', 'r']:
                return 'loses'; 
            case ['s', 'p']:
                return 'wins'; 
            case ['s', 's']:
                return 'draws';
            default:
                echo 'INVALID COMBINATION';
                echo "\n";
        }
    }
}

// Player options:
if (array_key_exists('rock', $input) || array_key_exists('r', $input)) { // Is rock
    $playerchoice = 'r';
    $prandom = false;
} elseif (array_key_exists('paper', $input)|| array_key_exists('p', $input)) { // Is paper
    $playerchoice = 'p';
    $prandom = false;
} elseif (array_key_exists('scissors', $input) || array_key_exists('s', $input)) { // Is scissors
    $playerchoice = 's';
    $prandom = false;
}

// Loop through games
for ($x = 0; $x <= ($gamenumber-1); $x++) {

    // Computer chooses
    $compchoice = $choices[array_rand($choices)];

    if ($prandom) {
        $playerchoice = $choices[array_rand($choices)]; // Is random
    }
    
    switch (getResults($playerchoice, $compchoice, $input, $file)) { // Evaluate results
        case 'wins':
            $wins++;
            break;
        case 'draws':
            $draws++;
            break;
        case 'loses':
            $losses++;
            break;
        default:
            echo 'INVALID OUTCOME';
            echo "\n";
    }
}

// Delete history
if (array_key_exists('delete', $input) || array_key_exists('d', $input)) {
    echo "DELETING...\n";
    $file = fopen($filename,'w');
}

if (array_key_exists('o', $input)) {
    if (array_key_exists('long', $input) || $input['o'] == 'l') {
        echo "\nWins: $wins\nLosses: $losses\nDraws: $draws\nTotal: $gamenumber\nWritten output to '$filename'\nTime: ".(microtime(true)-$start)."\n";
    } else {
        echo "\nW/L/D/T\n$wins/$losses/$draws/$gamenumber\n\nWritten output to '$filename'\nTime: ".(microtime(true)-$start)."\n";
    }
} else {
    echo "\nW/L/D/T\n$wins/$losses/$draws/$gamenumber\nTime: ".(microtime(true)-$start)."\n";
}
?>