<?php
$data = '[{"Time": "2012-11-27 16:10:35", "NumPlayers": "1"}, {"Time": "2012-11-27 16:24:55", "NumPlayers": "1"}]';
$arrayData = json_decode($data, true);
 
echo 'data: [' . PHP_EOL;
foreach ($arrayData as $item) {
    echo '[Date.UTC(';
    $tmp = preg_split( '/(-| |\:)/', $item['Time'] );
    echo implode(', ', $tmp);
    echo '), ' . $item['NumPlayers'] . '],';
    echo PHP_EOL;
}
echo PHP_EOL . '];';
?>

data: [
[Date.UTC(2012, 11, 27, 16, 10, 35), 1],
[Date.UTC(2012, 11, 27, 16, 24, 55), 1],

];