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index.php
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<html>
<head>
<link rel="stylesheet" href="style.css"/>
</head>
<body>
<div class="top-bar">
<div class="top-bar-item"><a href="index.php">Play</a></div>
<div class="top-bar-item"><a href="help.php">Help</a></div>
<div class="top-bar-item"><a href="scores.php">Leaderboard</a></div>
</div>
<div class="button-top" onclick="document.body.scrollTop = 0; document.documentElement.scrollTop = 0;"><img class="button-top-icon" src="up-arrow.svg"/></div>
<div class="bottom-bar">
<div class="bottom-text">christosnc © 2018. All rights reserved.</div>
</div>
<div class="button-help">HELP</div>
<div class="button-scores">LEADERBOARD</div>
<form class="box" method="POST" action="index.php">
<?php
$total_questions = 5;
$total_easy = 26;
$total_medium = 25;
$total_hard = 27;
if(isset($_POST['finish'])){
//Finished
$data = simplexml_load_file("questions.xml");
$answer = $_POST['answer'];
$difficulty = $_POST['difficulty'];
$old_easy = $_POST['old-easy'];
$old_medium = $_POST['old-medium'];
$old_hard = $_POST['old-hard'];
$old = [];
if($difficulty == "easy") $old = explode(",", $old_easy);
else if($difficulty == "medium") $old = explode(",", $old_medium);
else if($difficulty == "hard") $old = explode(",", $old_hard);
$real_answer = $data->$difficulty->question[intval($old[intval(count($old) - 2)])]->answer;
$correct = 0;
if(intval($answer) == intval($real_answer)) $correct = 1;
$answer = $_POST["old-answer"] . $correct . ",";
$difficulty = $_POST["old-difficulty"];
$answer = explode(",", $answer);
$difficulty = explode(",", $difficulty);
$ret = "";
$ret .= "<div class='page-title'>Results</div>";
$ret .= "<div class='results'>";
$ret .= "<div class='results-top-row'>";
$ret .= "<div class='results-top-row-index'>Index</div>";
$ret .= "<div class='results-top-row-answer'>Answer</div>";
$ret .= "<div class='results-top-row-difficulty'>Difficulty</div>";
$ret .= "<div class='results-top-row-points'>Points</div>";
$ret .= "</div>";
$total_points = 0;
for($i = 0; $i < count($answer) - 1; $i++){
if($i % 2 == 0) $ret .= "<div class='results-row'>";
else $ret .= "<div class='results-row' style='background-color: #3b3b3b;'>";
$ret .= "<div class='results-index'>Question " . ($i + 1) . "</div>";
if(intval($answer[$i]) == 0) $ret .= "<div class='results-answer results-incorrect'>Incorrect</div>";
else $ret .= "<div class='results-answer results-correct'>Correct</div>";
$ret .= "<div class='results-difficulty'>" . $difficulty[$i] . "</div>";
$points = 0;
if(intval($answer[$i]) == 1){
if($difficulty[$i] == "easy") $points = 100;
else if($difficulty[$i] == "medium") $points = 200;
else if($difficulty[$i] == "hard") $points = 300;
}
$total_points += $points;
$ret .= "<div class='results-points'>" . $points . "</div>";
$ret .= "</div>";
}
$ret .= "</div>";
$ret .= "<div class='total-points'>Total score: " . $total_points . "</div>";
$results = 1;
echo($ret);
} else if(isset($_POST['start'])){
//First question
$data = simplexml_load_file("questions.xml");
$index = $_POST['index'];
$random = rand(0, $total_medium - 1);
$ret = "";
$ret .= "<div class='page-title'>Question 1 / {$total_questions}</div>";
$ret .= "<div class='title'>" . $data->medium->question[$random]->title . "</div>";
$ret .= "<div class='option-wrapper'>";
for($i = 0; $i < count($data->medium->question[$random]->option); $i++){
$ret .= "<input type='radio' name='answer' required value='" . ($i + 1) . "' id='radio{$i}' class='option'><label for='radio{$i}'>" . $data->medium->question[$random]->option[$i] . "</label><br>";
}
$ret .= "</div>";
$ret .= "<input name='old-difficulty' style='display:none;' value='medium,'></input>";
$ret .= "<input name='old-answer' style='display:none;' value=''></input>";
$ret .= "<input name='old-easy' style='display:none;' value=''></input>";
$ret .= "<input name='old-medium' style='display:none;' value='" . $random . ",'></input>";
$ret .= "<input name='old-hard' style='display:none;' value=''></input>";
$ret .= "<input name='index' style='display:none;' value='" . ($index + 1) . "'></input>";
$ret .= "<input name='difficulty' style='display:none;' value='medium'></input>";
$ret .= "<button class='button button-finish' formnovalidate name='finish'>Finish</button>";
$ret .= "<button class='button button-next' name='next'>Next</button>";
echo($ret);
} else if(isset($_POST['next'])){
//Next question
$data = simplexml_load_file("questions.xml");
$index = $_POST['index'];
$answer = $_POST['answer'];
$difficulty = $_POST['difficulty'];
$old_easy = $_POST['old-easy'];
$old_medium = $_POST['old-medium'];
$old_hard = $_POST['old-hard'];
$old = [];
if($difficulty == "easy") $old = explode(",", $old_easy);
else if($difficulty == "medium") $old = explode(",", $old_medium);
else if($difficulty == "hard") $old = explode(",", $old_hard);
$real_answer = $data->$difficulty->question[intval($old[intval(count($old) - 2)])]->answer;
$correct = 0;
if(intval($answer) == intval($real_answer)){
$correct = 1;
if($difficulty == "easy") $difficulty = "medium";
else $difficulty = "hard";
} else{
if($difficulty == "hard") $difficulty = "medium";
else $difficulty = "easy";
}
if($difficulty == "easy") $old = explode(",", $old_easy);
else if($difficulty == "medium") $old = explode(",", $old_medium);
else if($difficulty == "hard") $old = explode(",", $old_hard);
$max_range = 0;
if($difficulty == "easy") $max_range = $total_easy - 1;
if($difficulty == "medium") $max_range = $total_medium - 1;
if($difficulty == "hard") $max_range = $total_hard - 1;
$random = rand(0, $max_range);
while(in_array($random, $old)) $random = rand(0, $max_range);
if($difficulty == "easy") $old_easy .= $random . ",";
if($difficulty == "medium") $old_medium .= $random . ",";
if($difficulty == "hard") $old_hard .= $random . ",";
$ret = "";
$ret .= "<div class='page-title'>Question " . ($index + 1) . " / {$total_questions}</div>";
$ret .= "<div class='title'>" . $data->$difficulty->question[$random]->title . "</div>";
$ret .= "<div class='option-wrapper'>";
for($i = 0; $i < count($data->$difficulty->question[$random]->option); $i++){
$ret .= "<input type='radio' name='answer' required value='" . ($i + 1) . "' id='radio{$i}' class='option'><label for='radio{$i}'>" . $data->$difficulty->question[$random]->option[$i] . "</label><br>";
}
$ret .= "</div>";
$ret .= "<input name='old-difficulty' style='display:none;' value='" . $_POST["old-difficulty"] . $difficulty . ",'></input>";
$ret .= "<input name='old-answer' style='display:none;' value='" . $_POST["old-answer"] . $correct . ",'></input>";
$ret .= "<input name='old-easy' style='display:none;' value='" . $old_easy . "'></input>";
$ret .= "<input name='old-medium' style='display:none;' value='" . $old_medium . "'></input>";
$ret .= "<input name='old-hard' style='display:none;' value='" . $old_hard . "'></input>";
$ret .= "<input name='index' style='display:none;' value='" . ($index + 1) . "'></input>";
$ret .= "<input name='difficulty' style='display:none;' value='" . $difficulty . "'></input>";
if(($index + 1) == $total_questions){
$ret .= "<button class='button button-finish-last' formnovalidate name='finish'>Finish</button>";
} else{
$ret .= "<button class='button button-finish' formnovalidate name='finish'>Finish</button>";
$ret .= "<button class='button button-next' name='next'>Next</button>";
}
echo($ret);
} else{
//Init
$ret = "";
$ret .= "<div class='page-title'>The C language quiz game!</div>";
$ret .= "<input name='index' style='display:none;' value='0'></input>";
$ret .= "<button class='button button-start' name='start'>Begin</button>";
echo($ret);
}
?>
</form>
<?php
if($results == 1){
$ret = "";
$ret .= "<form class='box box2' method='POST' action='scores.php'>";
$ret .= "<input name='points' style='display:none;' value='{$total_points}'></input>";
$ret .= "<input class='nickname' name='nickname' required placeholder='Nickname'>";
$ret .= "<button class='button button-addtoleaderboard' name='addscore'>Add to leaderboard</button>";
$ret .= "<div class='or'>OR</div>";
$ret .= "</form>";
$ret .= "<form class='box box2' method='POST' action='index.php'>";
$ret .= "<button class='button button-playagain'>Play again</button>";
$ret .= "</form>";
echo($ret);
}
?>
</body>
</html>