根据文件的最后两个字符对文件进行排序

Question

I collect the files from a folder using some Smarty code:

{assign var=files value="uploads/Documenten/GPS-Tracks/*.html"|glob}

{if count($files)}
    <ul>
        {foreach from=$files item='file'}
            {assign var='gpstrack_location' value="{$file|cms_escape:'urlpathinfo'}"}
            {if !$file|contains:"index"}
                <li><a href="{$file}">{$file|basename|substr:0:-5}</a></li>
            {/if}
        {/foreach}
    </ul>
{/if}

This gives me a sorted list basedon the first character.

• Brighton-Gosport_2108
• Brighton-Littlehampton_2012
• Brighton-Portmouth-Brighton_2018
• Bruinisse-Herkingen_2012
• BurnhamonCrouch_Vlissingen_22aug13
• Calais-Dieppe_2014
• Carteret-Dielette_2012
• Cherbourg-StVaast_2012
• Clubwedstrijd_17sept11
• Clubwedstrijd_18sep10
• Clubwedstrijd_21sep13
• Cowes-BeauLieu_River_2012
• Dartmouth-Guernsey_2012
• Deauville-Honfleur_2012
• Denemarken_2008
• Dielette-Alderney_2012
• Dieppe-Boulogne_2012

What I'd like to achive is a sorted list based on the last two charaters. Is there in Smarty or PHP a way to do this?

Thanks in advance for your help!

UPDATE: I got myself a couple of steps futher :) There remains one warning I'm not able to solve: The code so far:

<?php

    $folder = '<some foldername>';

    $files = array_values(preg_grep('/^([^.])/', scandir($folder, SCANDIR_SORT_ASCENDING)));
    //$files = scandir($folder);

    //print_r($files);

    usort(var_dump($files, function ($a, $b){
        if ($a || $b <> "")
            return substr($b, strlen($b) - 2) - substr($a, strlen($a) - 2);
    }));
?>

The warning I get, and thought to solve with the 'or'-statement:

[

• 121] => string(29) "Weymouth-Lyme_Reges_2012.html"
• [122]=> string(24) "Yarmouth-Poole_2012.html" }
• object(Closure)#1036 (1) {["parameter"]=> array(2) { ["$a"]=> string(10) "" ["$b"]=> string(10) "" } } Warning: usort() expects exactly 2 parameters, 1 given in /Users/name/Sites/install/assets/udt/sort-on-last-characters.php on line 55

Someone able to get me a step further?

Answer 1

Found a solution.

<?php
$files = glob($folder.$file_name);
$current_year = date('y');
if (
    usort($files, function($a, $b) {
        $yearA = (int) substr($a, -7); // extension + . + last two characters
        $yearB = (int) substr($b, -7);
        return $yearB - $yearA; // descending, for ascending swap $yearA and $yearB
    })
) {
    // $files is now sorted, do your stuff here
    foreach ((array) $files as $file) {

        if (substr(basename($file, '.html'), -2) == $current_year) {
            echo basename($file, '.html');
            echo "<br />";
        } else {
            $current_year = $current_year - 1;

        }
    }

} else {
    // sorting failed, show error message, exception, etc.
    echo "Files not sorted";
}    
?>