tao-test/app/vendor/respect/validation/docs/rules/Cntrl.md

Cntrl

• v::cntrl()
• v::cntrl(string $additionalChars)

This is similar to v::alnum(), but only accepts control characters:

v::cntrl()->validate("\n\r\t"); // true

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See also:

• Alnum
• Prnt
• Punct
• Space