try searching the php-website
. there is an online manual wich is searchable and can answer a lot of questions.
For now, see this page
thanks a lot Daan :P you helped me a lot .
Sorry me for stupid quesiton above but before asking here I always searching on php net . I was not find it on php.net because I was searching for "small cap" , while the solution was searching for "lowercase"
. Thank you again .