Regex for all PRINTABLE characters

Question

Is there a special regex statement like \\w that denotes all printable characters? I\'d like to validate that a string only contains a character that can be printed--i.e. do

Answer 1

There is a POSIX character class designation [:print:] that should match printable characters, and [:cntrl:] for control characters. Note that these match codes throughout the ASCII table, so they might not be suitable for matching other encodings.

Failing that, the expression [\x00-\x1f] will match through the ASCII control characters, although again, these could be printable in other encodings.