<?php
// File name:	captitle.inc.php
// Description:	PHP subroutines to capitalize a title
// Date:	2006-08-30
// Author:	imacat <imacat@pristine.com.tw>
// Copyright:	Copyright (C) 2006-2007 Pristine Communications

// capitalize_title: Capitalize a title
function capitalize_title($title)
{
    $title = preg_replace("/\\b(\\w+)\\b/ie", "_captitle_capitalize_word(\"\\1\");", strtolower($title));
    $title = preg_replace("/(: +)(\\w+)\\b/ie", "\"\\1\" . ucfirst(\"\\2\");", $title);
    $title = preg_replace("/'S /", "'s ", $title);
    return ucfirst($title);
}

// _captitle_capitalize_word: Capitalize a word
function _captitle_capitalize_word($word)
{
    // Words that should not be capitalized
    if (preg_match("/^(a|about|across|after|against|along|among|an|and|around|at|before|below|beneath|beside|besides|between|beyond|but|but|by|concerning|despite|down|during|except|excepting|for|for|from|in|into|like|near|nor|of|off|on|or|past|regarding|since|so|the|through|throughout|thus|till|to|toward|under|underneath|up|upon|with|within|without|yet)$/i", $word)) {
        return strtolower($word);
    }
    // Words without any vowel that look like an abbreviation
    if (!preg_match("/[aeiou]/i", $word)) {
        return strtoupper($word);
    }
    // Words that look like a roman number
    if (preg_match("/^(?:i|ii|iii|iv|v|vi|vii|viii|ix|x|xi|xii|xiii)$/i", $word)) {
        return strtoupper($word);
    }
    return ucfirst($word);
}

?>