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(PHP 4, PHP 5)
strtolower — Make a string lowercase
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.
The input string.
Returns the lowercased string.
Example #1 strtolower() example
$str = "Mary Had A Little Lamb and She LOVED It So";
$str = strtolower($str);
echo $str; // Prints mary had a little lamb and she loved it so
Note: This function is binary-safe.