fix string case

hello there,
I have a function that converts strings into lowercase and if some keywords are found then it will fix them to its correct case..
I would like to implement something so that if if the strings like these are found

name test [big]
testing (small)
some text 200a
a-one

these are just sample so I would need to implement something so that in case of
[big] would be [Big] or
(small) would be (Small)
200a1 would be 200A1
a-one would be A-One

basically to make something so that the first letter is upper case after a char that is no [a-z]
function formatCase($str) {
$specialwords = array('FIFA','IV','VA','AV','DJ','CAD','RAR','ZIP','IDM','GTA','iMac');
 
	$directory = array();
	foreach($specialwords as $special) {
	        $directory[strtolower($special)] = $special;
	}
	$result = '';
	foreach (explode(' ',$str) as $word) {
	        $key = strtolower($word);
	        $result .= (isset($directory[$key]) ? $directory[$key] : $word).' ';
	}
	return trim($result);
}

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XK8ERAsked:
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Jonah11Commented:
untested, but after line 9 insert:

not that this accomplishes "basically to make something so that the first letter is upper case after a char that is no [a-z]" but, in the case of a-one, would convert it to a-One, not A-One.  perhaps a special case is needed for that?  
$word = preg_replace_callback(
        '|[^a-z][a-z]|',
        create_function(
            // single quotes are essential here,
            // or alternative escape all $ as \$
            '$matches',
            'return strtoupper($matches[0]);'
        ),
        $word
    );

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Jonah11Commented:
note that in the above post "not that" should read "note that" :)
0
 
Jonah11Commented:
also, in my code snippet you may want to change line 2 to read:
'|[^a-zA-Z][a-z]|',

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