slides.php

slidegenerator.php

<?php
/** 
 * Reads a directory and outputs an <img> tag for each *.jpg
 * file it finds.
 */
$slides = array_map(function($fname) {
    $src = "img/slides/anatomy/" . basename($fname);
    return "<img src=\"{$src}\" class=\"slide\">";
}, array_filter(scandir($dir), function($path) {
    return (bool)(strpos($path, '.jpg'));
}));

echo implode(PHP_EOL, $slides);

foreach ($slides as $slide) {
    echo "<div class=\"slide\">{$slide}</div>" . PHP_EOL;
}