Rename all images in a folder based on seed keyword array

rename.php

<?php

$seed_words = [
	'word1',
	'word2',
	'word3',
];

$files = [];

if ($handle = opendir('.')) {
    while (false !== ($entry = readdir($handle))) {
        if ($entry != "." && $entry != ".." && $entry[0] != '.') {
            if ( strpos( strtolower( $entry ) , '.jpg') !== false || strpos( strtolower( $entry ) , '.png') !== false ) {
            	$files[] = $entry;
            }
        }
    }

    closedir($handle);
}

foreach ( $files as $key => $file ) {
	rename( $file, $key . $seed_words[ rand(0, count( $seed_words ) - 1 ) ] . '.jpg' );
}