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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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