35 $first = mb_substr( $str, 0, 1 );
36 if ( in_array( $first, self::LC ) ) {
37 $first = str_replace( self::LC, self::UC, $first );
38 return $first . mb_substr( $str, 1 );
40 return parent::ucfirst( $str );
45 $first = mb_substr( $str, 0, 1 );
46 if ( in_array( $first, self::UC ) ) {
47 $first = str_replace( self::UC, self::LC, $first );
48 return $first . mb_substr( $str, 1 );
50 return parent::lcfirst( $str );