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ctype_xdigit

(PHP 4 >= 4.0.4)

ctype_xdigit --  Check for character(s) representing a hexadecimal digit

Description

bool ctype_xdigit ( string text)

Returns TRUE if every character in text is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f] , FALSE otherwise.

See also ctype_digit().

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