Lowercase a UTF-8 string.
$text: The string to run the operation on.
string The string in lowercase.
function drupal_strtolower($text) {
global $multibyte;
if ($multibyte == UNICODE_MULTIBYTE) {
return mb_strtolower($text);
}
else {
// Use C-locale for ASCII-only lowercase
$text = strtolower($text);
// Case flip Latin-1 accented letters
$text = preg_replace_callback('/\\xC3[\\x80-\\x96\\x98-\\x9E]/', '_unicode_caseflip', $text);
return $text;
}
}