(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for any printable character(s) except space

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for printable character(s)

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for whitespace character(s)

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for alphanumeric character(s)

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for any printable character which is not whitespace or an alphanumeric

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for uppercase character(s)

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for control character(s)

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for numeric character(s)

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for alphabetic character(s)

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for lowercase character(s)