<?php

  $a = parse_url("http://www.mclink.it/")
  ...
  $f = fopen("http://www.mclink.it/index.html", "r");

?>

In both cases the parser complaints with:
  Warning: unable to parse url (http://www.mclink.it/...) in <path>/test.phtml on line <xyz>

--

The configure command line is:

./configure --with-apxs=/u0/apache/bin/apxs --with-shared-apache=../apache_1.3.2
 --with-gd --with-mysql --with-dbase=no --with-config-file-path --enable-debug=no
 --enable-track-vars=yes --enable-bcmath=yes --enable-short-tags=no --enable-dl=yes
 --with-zlib=yes

--

No php3.ini file is used.

--

Apparently, the error comes from the url_parse() C function. I've tried to use both the included
regex library and the system regex library, to no avail.

--

Well. I was wrong. Using the system regex library in PHP 3.0.5 parse_url *does* work as expected. The bundled regex library simply doesn't work on Digital Unix 3.2D, either compiled with DEC C compiler or with GCC 2.8.1. Maybe it's worth to be mentioned somewhere, or to modify the configure script.