How do you remove the new line code (
) with php?

Ok, so I was tasked with created a gallery, using a sql table is not an option, so I am doing what I can. This is my code, wich works fine, but it generates a hidden character at the end of every imate.

<?php
    $photos = file("/elements/photos.php");
    for ($i = 0; $i < count($photos); $i++) {
    $allimages .= $imagefile =  '<img src="/elements/photos/'.$photos[$i].'">';};
?>
<?=$allimages?>

This is the code that it generates

<img src="/elements/photos/t/a_little_kitten.jpg&#10;">

I have been unable to find what this means, I believe it means "blank space" or "new line", but I cannot find it.

This is the code I have tried, but it does not work either.

$allimages = preg_replace('/\s\s+/', ' ', $allimages)

Please help.

Below is the php file I am pulling the image names from. There is no code in this file, just text.

a_little_kitten.jpg
black_cat.jpg
basket.jpg