<? 
$info = pathinfo("/foo/bar");
echo ($info["dirname"]."<br>\n");
echo ($info["basename"]."<br>\n");
echo ($info["extension"]."<br>\n");
?>

This should print:
/foo<br>
bar<br>
<br>

but will not return.

<?
$info = pathinfo("/foo/bar.baz");
echo ($info["dirname"]."<br>\n");
echo ($info["basename"]."<br>\n");
echo ($info["extension"]."<br>\n");
?>

prints<?
$info = pathinfo("/foo/bar.");
echo ($info["dirname"]."<br>\n");
echo ($info["basename"]."<br>\n");
echo ($info["extension"]."<br>\n");
?>
/foo<br>
bar.baz<br>
baz<br>

as expected and

<?
$info = pathinfo("/foo/bar.");
echo ($info["dirname"]."<br>\n");
echo ($info["basename"]."<br>\n");
echo ($info["extension"]."<br>\n");
?>

prints
/foo<br>
bar.<br>
<br>

as expected, it's only the case where there is no trailing . that pathinfo fails to work.

The configure line is:

 './configure' '--with-config-file-path=/www/conf' '--enable-track-vars' '--with-apxs=/usr/apache/bin/apxs' '--with-oci8' '--enable-ftp' '--with-mysql' '--with-pgsql' '--enable-xml' '--enable-inline-optimization' '--disable-debug' '--with-zlib' '--enable-shared' '--with-gnu-ld' '--with-mcrypt'