NarKampen/dbFiles/Question.php

<?php
	error_reporting( E_ALL );
	$hostname = 'localhost';
	$username = 'narKampen';
	$pass = 'IfRLzj2HJBXA9eei';
	$database = 'narKampen';

	$conn = new mysqli($hostname, $username, $pass, $database);
	
	$gameId = $_POST["gameId"];

	if (!$conn) {
		die("Connection Failed. ". mysqli_connect_error());
	}
	mysqli_set_charset($conn,'utf8');
	
	$sql = "SELECT questions.id, question, answer, categoryId as category, name, r,g,b,a FROM questions INNER JOIN questionToCategory ON questions.id = questionToCategory.questionId INNER JOIN category on category.id = questionToCategory.categoryId WHERE questionToCategory.categoryId IN (SELECT categoryId FROM gameCategories WHERE gameId = $gameId) ORDER BY RAND() limit 1";
	
	$result = mysqli_query($conn, $sql);
	
	$json = array();
	
	if (mysqli_num_rows($result) > 0) {
		while ($row = mysqli_fetch_assoc($result)) {
			$json = array('id' => $row['id'],
				'question' => $row['question'],
				'answer' => $row['answer'],
				'category' => $row['category'],
				'categoryName' => $row['name'],
				'r' => $row['r'],
				'g' => $row['g'],
				'b' => $row['b'],
				'a' => $row['a'],);
		}
		$jsonString = json_encode($json);
		echo $jsonString;
	}

?>