(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 any printable character which is not whitespace or an alphanumeric
(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 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 character(s) representing a hexadecimal digit
(PHP 4 >= 4.0.4, PHP 5, PHP 7) Check for alphabetic character(s)
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