strtolower
    (PHP 3, PHP 4 )
strtolower -- Make a string lowercase
Description
string 
strtolower ( string str)
     Returns string with all alphabetic
     characters converted to lowercase.
    
     Note that 'alphabetic' is determined by the current locale. This
     means that in i.e. the default "C" locale, characters such as
     umlaut-A (Ä) will not be converted.
    
Example 1. strtolower() example <?php
$str = "Mary Had A Little Lamb and She LOVED It So";
$str = strtolower($str);
print $str; # Prints mary had a little lamb and she loved it so
?>  |  
  | 
     See also strtoupper(),
     ucfirst(),
     and ucwords().