I have created a photo gallery that displays photos by reading a directory. Now I want to sort those photos when they are displayed by modification time so that the most recent photo uploads appear first. I am baffled on how to do this.
Here is code from one of my galleries:
<?php
/* function: generates thumbnail */
function make_thumb($src,$dest,$desired_width) {
/* read the source image */
$source_image = imagecreatefromjpeg($src);
$width = imagesx($source_image);
$height = imagesy($source_image);
/* find the "desired height" of this thumbnail, relative to the desired width */
$desired_height = floor($height*($desired_width/$width));
/* create a new, "virtual" image */
$virtual_image = imagecreatetruecolor($desired_width,$desired_height);
/* copy source image at a resized size */
imagecopyresized($virtual_image,$source_image,0,0,0,0,$desired_width,$desired_height,$width,$height);
/* create the physical thumbnail image to its destination */
imagejpeg($virtual_image,$dest);
}
/* function: returns files from dir */
function get_files($images_dir,$exts = array('jpg')) {
$files = array();
if($handle = opendir($images_dir)) {
while(false !== ($file = readdir($handle))) {
$extension = strtolower(get_file_extension($file));
if($extension && in_array($extension,$exts)) {
$files[] = $file;
}
}
closedir($handle);
}
return $files;
}
/* function: returns a file's extension */
function get_file_extension($file_name) {
return substr(strrchr($file_name,'.'),1);
}
/** settings **/
$images_dir = 'images/installs2/';
$images = glob($images_dir."*.jpg");
$thumbs_dir = 'images/installs2/thumbs/';
$thumbs_width = 250;
$images_per_row = 3;
/** generate photo gallery **/
$image_files = get_files($images_dir);
if(count($image_files))
{
$index = 0;
foreach($image_files as $index=>$file)
{
$index++;
$thumbnail_image = $thumbs_dir.$file;
if(!file_exists($thumbnail_image))
{
$extension = get_file_extension($thumbnail_image);
if($extension) {
make_thumb($images_dir.$file,$thumbnail_image,$thumbs_width);
}
}
echo '<a href="',$images_dir.$file,'"class="photo-link" rel="lightbox[]">
<img src="',$thumbnail_image,'" /></a>';
array_multisort(array_map('filemtime', $images), SORT_DESC, $images);
if($index % $images_per_row == 0)
{
echo '<div class="clear"></div>'; }
}
echo '<div class="clear"></div>';
}
else {
echo '<p>There are no images in this gallery.</p>';
}
?>
As you can see in my code, I have tried using the array_multisort, but it still hasn't sorted the photos. Thanks in advance for the assistance on this! 🙂
