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ctype_alpha> <ctype
Last updated: Sun, 25 Nov 2007

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ctype_alnum

(PHP 4 >= 4.0.4, PHP 5)

ctype_alnum — Έλεγχος για αλφαριθμητικούς χαρακτήρες

Περιγραφή

bool ctype_alnum ( string $text )

Επιστρέφει TRUE εάν κάθε χαρακτήρας της text είναι είτε γράμμα είτε ψηφίο, αλλιώς FALSE. Στη standard C ως γράμματα θεωρούνται τα [A-Za-z]. Η συνάρτηση είναι ισοδύναμη με (ctype_alpha($text) || ctype_digit($text)).

Ανατρέξτε επίσης στις: ctype_alpha(), ctype_digit(), και setlocale().



ctype_alpha> <ctype
Last updated: Sun, 25 Nov 2007
 
add a note add a note User Contributed Notes
ctype_alnum
kostromin at gmail com
26-Feb-2008 02:24
@ ben at onshop dot co dot uk

Your example is the slowest possible way to do it.
The whole idea behind using ctype_alnum is that it is much faster than a regexp.
If you have to use regexp, at least use PCRE, not POSIX.
ben at onshop dot co dot uk
12-Jan-2008 07:03
Oops, above example should read:

if(eregi('[^a-zA-Z0-9_]', $str)){
 $msg = 'Please enter an alphanumeric value';
)
ben at onshop dot co dot uk
12-Jan-2008 05:26
An alternative if you need to accept underscores as well:

$str = 'user_name';

if(!eregi('[^a-zA-Z0-9_]', $str)){
 $msg = 'Please enter an alphanumeric value';
)

ctype_alpha> <ctype
Last updated: Sun, 25 Nov 2007
 
 
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