While loop, not looping in the correct order

Question

Disclaimer: I did not write this code myself a friend gave it to me.

<?php
    $handle = opendir(dirname(realpath(__FILE__)).'/AlgemeneVergaderingen/');
    while($file = readdir($handle)){
        if($file !== '.' && $file !== '..'){
        echo '<p><a href="AlgemeneVergaderingen/' .$file.'">' .$file. '</a></p>';
        }
    }
?>

The point of this code is to loop inside a map and get all the files and echo them out IN THE ORDER that they are inside of the map.

The code does echo them but not in the correct order.

below 2 pictures to help visualize.

full code/file structure

the actual result

Before you print the filenames put them into an array and sort it as you want(See: http://stackoverflow.com/q/17364127/3933332). — Rizier123, Nov 08 '16 at 00:13
http://stackoverflow.com/questions/2320024/are-there-any-php-code-visualization-tools — , Nov 08 '16 at 00:13
First off, it is best to actually put the code in the question instead of linking to an image. Second, you are using `
` instead of ``. — esote, Nov 08 '16 at 00:13
I dont' fully understand why I need to put it in an array and sort it, if the files (in this case pdf's) are in the correct order shouldn't it just read them in correctly? — Bjorn Pijpops, Nov 08 '16 at 00:20
@BjornPijpops where specifically are you seeing them ordered ? On the FTP ? They are ordered based on the UI grid ordering system. The files you are retrieving are never specifically ordered. You have to order them for yourself before you output them as Rizier123 mentioned. — Jim, Nov 08 '16 at 00:23
@Jim Yes they are ordered in the FTP so I figured that when I would use readdir, it would maintain the same order which it clearly doesn't but the explanation as to why it doesn't was given by starnzd. — Bjorn Pijpops, Nov 08 '16 at 00:27

score 0 · Accepted Answer · answered Nov 08 '16 at 00:20

0

readdir() doesn't guarantee any order. You need to order it yourself.

For reference:

https://utcc.utoronto.ca/~cks/space/blog/unix/ReaddirOrder

answered Nov 08 '16 at 00:20

genesst

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Thanks this was the actual clear explanation I was looking for! – Bjorn Pijpops Nov 08 '16 at 00:24

While loop, not looping in the correct order

1 Answers1