How do I sort a directory listing alphabetically using `opendir()` in PHP?

Alphabetically Sorting Directory Listings with opendir() in PHP

To sort a directory listing alphabetically using opendir() in PHP, follow these steps:

1. Gather Files into an Array: Before sorting, read all files into an array using $dirFiles = array();, similar to this:

<code class="php">$dirFiles = array();
while (false !== ($file = readdir($handle))) {
    $dirFiles[] = $file;
}</code>

2. Sort the Array: Once the files are in the array, you can sort them alphabetically using sort():

<code class="php">sort($dirFiles);</code>

3. Display the Sorted Listings: Finally, iterate over the sorted $dirFiles array and display the images and thumbnails as before:

<code class="php">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";
}</code>

Here's a modified script that incorporates these steps:

<code class="php">... (unchanged code) ...

// Read files into an array
$dirFiles = array();
while (false !== ($file = readdir($handle))) {
    if ($file != "." &amp;&amp; $file != ".." &amp;&amp; $file != "index.php" &amp;&amp; $file != "Thumbnails") {
        $dirFiles[] = $file;
    }
}
closedir($handle);

// Sort the array
sort($dirFiles);

// Display the sorted listings
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";
}</code>

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