Funções da Ctype

Índice

ctype_alnum — Verifica se os caracteres são alfanuméricos
ctype_alpha — Verifica se os caracteres são alfabéticos
ctype_cntrl — Verifica se os caracteres são de controle
ctype_digit — Verifica se os caracteres são numéricos
ctype_graph — Verifica se os caracteres são imprimíveis exceto espaço
ctype_lower — Verifica se os caracteres estão minúsculos
ctype_print — Verifica se os caracteres são imprimíveis
ctype_punct — Verifica se é um caractere imprimível que não é whitespace ou alfanumério
ctype_space — Verifica se os caracteres são whitespace
ctype_upper — Verifica se os caracteres são maiúsculos
ctype_xdigit — Verifica se os caracteres representam um dígito hexadecimal

ctype_alnum

Constantes pré-definidas

Last updated: Fri, 03 Feb 2012

User Contributed Notes
Funções da Ctype

jerome at yazo dot net
15-Mar-2009 01:18


worth noticing? It seems that the ctype_alpha family of functions won't handle UTF-8 string (php 5.2.6)



<?php



$texte = 'jérôme';

setLocale(LC_CTYPE, 'FR_fr');

echo 'Pure ascii ? ', (ctype_alpha($texte) ) ? 'yes' : 'no';

echo '<br />';

$texte = iconv( "UTF-8", "ISO-8859-1", $texte) ;

echo  'Letters only ? ' , (ctype_alpha($texte) ) ? 'yes' : 'no';



?>



ouputs :



Pure ascii ? no

Letters only ? yes

14-Oct-2006 11:44


In PHP versions before 4.4.1, ctype functions have a bug handling very large integers.

http://bugs.php.net/bug.php?id=34645

See Crimson's comment under ctype_digit, or this test code from the bug:

<?php

$id = 394829384;

var_dump($id);

ctype_digit($id);

var_dump($id);

?>



Expected result:

----------------

int(394829384)

int(394829384)



Actual result:

--------------

int(394829384)

NULL



The fix is to cast it as a string:

<?php

ctype_digit((string)$id);

?>

... or use a current version of PHP!

avarab at gmail dot com
03-Jan-2006 06:58


In case the ctype_*() functions aren't compiled in your PHP and you can't recompile for some reason (e.g. shared host) you can use the compatability functions from the MediaWiki project which use preg_* as a replacement[1], removing lines 2 and 3 in the source should make them suitable for usage elsewhere.



Shameless self-advertisement, but hey, we find them useful;)



1. A tinyurl because the submission script complained about long lines: http://tinyurl.com/7hz4l

1. The real url split up:

http://cvs.sourceforge.net/viewcvs.py/*checkout*/

wikipedia/phase3/includes/compatability/ctype.php

ctype_alnum

Constantes pré-definidas

Last updated: Fri, 03 Feb 2012