Sort and display directory list alphabetically using opendir() in php

Question

Hi there, php noob here - I've cobbled together this script to display a list of images from a folder with opendir, but I can't work out how (or where) to sort the array alphabetically

<?php

// opens images folder
if ($handle = opendir('Images')) {
while (false !== ($file = readdir($handle))) {

// strips files extensions 
$crap   = array(".jpg", ".jpeg", ".JPG", ".JPEG", ".png", ".PNG", ".gif", ".GIF", ".bmp", ".BMP", "_", "-"); 

$newstring = str_replace($crap, " ", $file );  

//asort($file, SORT_NUMERIC); - doesnt work :(

// hides folders, writes out ul of images and thumbnails from two folders

    if ($file != "." && $file != ".." && $file != "index.php" && $file != "Thumbnails") {
    echo "<li><a href=\"Images/$file\" class=\"thickbox\" rel=\"gallery\" title=\"$newstring\"><img src=\"Images/Thumbnails/$file\" alt=\"$newstring\" width=\"300\"  </a></li>\n";}
}
closedir($handle);
}

?>

Any advice or pointers would be much appreciated!

Answer 1

How about :

$directory = sort(scandir('Images'));

Answer 2

You need to read your files into an array first before you can sort them. How about this?

<?php
$dirFiles = array();
// opens images folder
if ($handle = opendir('Images')) {
    while (false !== ($file = readdir($handle))) {

     // strips files extensions      
     $crap   = array(".jpg", ".jpeg", ".JPG", ".JPEG", ".png", ".PNG", ".gif", ".GIF", ".bmp", ".BMP", "_", "-");    

     $newstring = str_replace($crap, " ", $file );   

     //asort($file, SORT_NUMERIC); - doesnt work :(

     // hides folders, writes out ul of images and thumbnails from two folders

        if ($file != "." && $file != ".." && $file != "index.php" && $file != "Thumbnails") {
         $dirFiles[] = $file;
        }
    }
    closedir($handle);
}

sort($dirFiles);
foreach($dirFiles as $file)
{
    echo "<li><a href=\"Images/$file\" class=\"thickbox\" rel=\"gallery\" title=\"$newstring\"><img src=\"Images/Thumbnails/$file\" alt=\"$newstring\" width=\"300\"  </a></li>\n";
}

?>

Edit: This isn't related to what you're asking, but you could get a more generic handling of file extensions with the pathinfo() function too. You wouldn't need a hard-coded array of extensions then, you could remove any extension.

Answer 3

$directory = scandir('Images');

Answer 4

Note: Move this into the foreach loop so that the newstring variable gets renamed correctly.

// strips files extensions
$crap = array(".jpg", ".jpeg", ".JPG", ".JPEG", ".png", ".PNG", ".gif", ".GIF", ".bmp", ".BMP", "_", "-");

    $newstring = str_replace($crap, " ", $file );

Answer 5

Sorry to steal this thread, but thought best to add here first instead of posting a new question.

1st: I may be missing something, but the alphabetical ordering is not 100% e.g. I am using this to create a slideshow of a folder of items (to replace a PC running Powerpoint) and if I name the slides 01, 02, 03, 04 this works fine, but, if the slides are called Slide01, Slide02, Slide03, Slide04 ... Slide41 the ordering gets messed up.

2nd: As a work around (and this probably should be another post) but could the opendir command scan subdirectories so for example:
..\show01\01.jpg, 02.jpg, 03.jpg
..\show02\01.jpg, 02.jpg, 03.jpg