<?php 
# Version 0.3

if (!defined('PmWiki')) exit();

Markup('columns', '_begin',
    '/(.*?)\(:column:\)(.*)$/se',
    "Columnize('$1', '$2')");

function Columnize($one, $two) {
  $bits = preg_split("/\(:colstart:\)/", $one);
  list($pre, $one) = (count($bits) > 1) ? $bits : array('', $bits[0]);
  $bits = preg_split("/\(:colend:\)/", $two);
  list($two, $post) = (count($bits) > 1) ? $bits : array($bits[0],'');

  return<<<RETURN
$pre
(:table border=0 cellspacing=0 cellpadding=6:)
(:cellnr valign=top width=50%:)
$one
(:cell valign=top width=50%:)
$two
(:tableend:)
$post
RETURN;
}