PHP script to create User-Rating Matrix from MovieLens 100K Dataset. https://datahub.io/dataset/movielens/resource/e2117a93-4fd4-41c3-b0e8-6a8ff8b1ad09

create_user_rating_matrix.php

<?php
$delimiter = "\t";
$fp = fopen('YOUR_ABSOLUTE_PATH_TO_DIRECTORY' . 'u.data'), 'r');

$ratings = [];
$items = [];

for ($i = 0; $i < 100000; $i++) {
    $line = fgets($fp, 2048);
    $data = str_getcsv($line, $delimiter);
    $items[$data[1]] = $data[1];
    $ratings[$data[0]][$data[1]] = $data[2];
}

$fw = fopen('YOUR_ABSOLUTE_PATH_TO_DIRECTORY' . 'user-rating-matrix.data', 'w');

fwrite($fw, "Users");

sort($items);
foreach ($items as $item) {
    fwrite($fw, "\tItem-" . $item);
}
fwrite($fw, "\n");

for ($i = 1; $i <= 943; $i++) {
    fwrite($fw, "User-" . $i);
    $userRatings = $ratings[$i];
    for ($j = 1; $j <= 1682; $j++) {
        if (array_key_exists($j, $userRatings)) {
            fwrite($fw, "\t" . $userRatings[$j]);
        } else {
            fwrite($fw,"\t?");
        }
    }
    fwrite($fw, "\n");
}
?>