This code

	$a = "/74.html";

	$url = $a;
	echo $url, "<BR>";
	echo basename($url, ".html"), "<BR>";
	echo "$a<BR>$url<BR>";

corrupts $a and $url both. Compare it with:

	$a = "/74.html";

	$url = $a;
	echo $url, "<BR>";
	echo basename("$url", ".html"), "<BR>";
	echo "$a<BR>$url<BR>";