<?php
$dblink = new PDO
(
    'mysql:host=localhost;dbname=robinjw48_verveeltzich', 'robinjw48_verveeltzich', 'ikverveelme'
);
$dblink->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$query = $dblink->prepare('SELECT name, success, challenge FROM pogingen WHERE success>0');
$query->execute();
$temp = $query->fetchAll();
echo '  <h2 id="scorelijst">Scorelijst</h2>
    <table border="1">
        <tr>
            <th>Naam</th>
            <th>Challenges</th>
            <th>Punten</th>
        </tr>';
$punten = array();
$challengesdone = array();
$namen = array();
$strchallengesdone = array();
foreach ($temp as $row)
{
    if (!(in_array ($row['name'], $namen)))
    {
        $namen[] = $row['name'];
    }
    if (!(@in_array ($row['challenge'], $challengesdone[$row['name']])))
    {
        $punten[$row['name']] += $row['success'];
        $challengesdone[$row['name']][] = $row['challenge'];
    }
}
foreach ($namen as $naam)
{
    foreach ($challengesdone[$naam] as $temp)
    {
        $strchallengesdone[$naam] .= $temp . ' ';
    }
}
foreach ($namen as $naam)
{
    echo '      <tr>
            <td>' . htmlentities($naam) . '</td>
            <td>' . htmlentities($strchallengesdone[$naam]) . '</td>
            <td>' . htmlentities($punten[$naam]) . '</td>
        <tr>';
}
echo '  </table>';
?>