Online PHP editor | output for l8JGB

@ 2013-11-21T01:25:49Z

<?php

function getPortion($products, $page, $per_page)
    {
    $index = $page * $per_page;

    // to get always positive module
    $real_index = ($index % sizeof($products) + sizeof($products)) % sizeof($products);

    $return = array_slice($products, $real_index, $per_page);
    while (sizeof($return) < $per_page)
        {
        $return = array_merge($return, array_slice($products, 0, $per_page - sizeof($return)));
        }
    return $return;
    }

$products = array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k');

// 0 page
echo json_encode(getPortion($products, 0, 3));
// ["a","b","c"]

// 3 page
echo json_encode(getPortion($products, 3, 3));
// ["j","k","a"]

// -1 page
echo json_encode(getPortion($products, -1, 3));
// ["i","j","k"]

// 0 page, but per_page larger than array length.
echo json_encode(getPortion(array('a', 'b', 'c'), 0, 5));
// ["a","b","c","a","b"]

Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: ["a","b","c"]["j","k","a"]["i","j","k"]["a","b","c","a","b"]
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6: Fatal error: Call to undefined function json_encode() in /in/l8JGB on line 21
Process exited with code 255.
Output for 5.1.0: Fatal error: fatal flex scanner internal error--end of buffer missed in /in/l8JGB on line 34
Process exited with code 255.
Output for 4.4.5 - 4.4.9: Fatal error: Call to undefined function: json_encode() in /in/l8JGB on line 21
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4: Fatal error: Call to undefined function: json_encode() in /in/l8JGB on line 21
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Call to undefined function: json_encode() in /in/l8JGB on line 21

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