leftypol/inc/functions/fs.php

<?php
namespace Vichan\Functions\Fs;


function link_or_copy(string $from, string $to) {
	if (!\link($from, $to)) {
		return \copy($from, $to);
	}
	return true;
}

function move_or_copy_uploaded(string $from, string $to) {
	if (!\move_uploaded_file($from, $to)) {
		return \copy($from, $to);
	}
	return true;
}

/**
 * Concats two paths accounting for directory separators.
 */
function concat_path(string $base, string $other): string {
	if ($base[\strlen($base) - 1] === DIRECTORY_SEPARATOR) {
		$base = \substr($base, 0, \strlen($base) - 1);
	}
	if ($other[0] === DIRECTORY_SEPARATOR) {
		return $base . $other;
	} else {
		return $base . DIRECTORY_SEPARATOR . $other;
	}
}