(PHP3 >= 3.0.3, PHP4 )
ucwords -- 
     Uppercase the first character of each word in a string
    
Description
string ucwords (string str)
     Capitalizes the first character of each word in
     str if that character is alphabetic.
     
Example 1. ucwords() example 
$text = "mary had a little lamb and she loved it so.";
$text = ucwords($text); // $text is now: Mary Had A Little 
                        // Lamb And She Loved It So.
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     See also strtoupper(),
     strtolower() and ucfirst().