PHP Handbuch
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# ctype_alnum

(PHP 4 >= 4.0.4)

ctype_alnum -- Check for alphanumeric character(s)

## Description

bool ctype_alnum ( string text)

Returns `TRUE` if every character in `text` is either a letter or a digit, `FALSE` otherwise. In the standard `C` locale letters are just `[A-Za-z]`. The function is equivalent to `(ctype_alpha($text) || ctype_digit($text))`.

See also ctype_alpha(), ctype_digit(), and setlocale().

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