Paginate files in a directory - php

Question

I have a directory with almost 60 images but in HD quality so theirs size are around 5 ~ 6 MB and load all them in a web page is to much time for server and browser so both hang up. I read this post and this other too and since I'm using PHP 5.4.20 in my server I'll like to use DirectoryIterator and LimitIterator but example leave in the post are not so explicit to me since I don't know how to move forward/backward in this cases. Can any give me some sample code about paginate files in a directory?
UPDATE: show some code
Right now this is how I read files:
function directoryToArray($directory, $recursive) {
$array_items = array();
if ($handle = opendir($directory)) {
while (false !== ($file = readdir($handle))) {
if ($file != "." && $file != "..") {
if (is_dir($directory . "/" . $file)) {
if ($recursive) {
$array_items = array_merge($array_items, directoryToArray($directory . "/" . $file, $recursive));
}
$file = $directory . "/" . $file;
$array_items[] = preg_replace("/\/\//si", "/", $file);
} else {
$file = $directory . "/" . $file;
$array_items[] = preg_replace("/\/\//si", "/", $file);
}
}
}
closedir($handle);
}
return $array_items;
}
$images = directoryToArray("images/portfolio/");
for ($i = 0; $i < count($images); $i++) {
$old_img_name = explode('/', $images[$i]);
$new_img_name = $old_img_name[0] . "/" . $old_img_name[1] . '/large/' . $old_img_name[2];
echo '<div class="span4 element">';
echo '<div class="hover_img">';
echo '<img src="' . $images[$i] . '" alt="" />';
echo '<span class="portfolio_zoom"></span>';
echo '</div>';
echo '</div>';
}

Answer 1

Aristona's absolutely right. You should probably resize the images to an appropriate file-format, quality & size. At the very least if you're trying to make some sort of gallery, you could use something like image magick to make 'thumbnails' for the gallery where clicking on them may take you to the full-quality image.
Image magick is scriptable in a variety of languages to batch process your images and build thumbnails if you want it to run as a process, alternatively from the command line you can do it as a once off, something like what's mentioned here:
Batch resize images into new folder using ImageMagick