Array
(
[0] => int
[1] => boolean
[2] => float
[3] => validate_regexp
[4] => validate_domain
[5] => validate_url
[6] => validate_email
[7] => validate_ip
[8] => validate_mac
[9] => string
[10] => stripped
[11] => encoded
[12] => special_chars
[13] => full_special_chars
[14] => unsafe_raw
[15] => email
[16] => url
[17] => number_int
[18] => number_float
[19] => magic_quotes
[20] => callback
)