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Request #42426 ctype_alnum fails on integers
Submitted: 2007-08-25 16:50 UTC Modified: 2007-08-28 10:18 UTC
From: phpbugs dot 20 dot zsh at spamgourmet dot com Assigned:
Status: Not a bug Package: Feature/Change Request
PHP Version: 5.2.3 OS: Irrelevant
Private report: No CVE-ID: None
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 [2007-08-25 16:50 UTC] phpbugs dot 20 dot zsh at spamgourmet dot com 
Description:
------------
ctype_alnum returns false if an integer is passed.

Reproduce code:
---------------
<?php
$var = 42;
var_dump($var, "$var");
?>


Expected result:
----------------
bool(true)
bool(true)


Actual result:
--------------
bool(false)
bool(true)

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 [2007-08-25 16:55 UTC] phpbugs dot 20 dot zsh at spamgourmet dot com 
Oops, the reproduce code should be:

<?php
$var = 42;
var_dump(ctype_alnum($var), ctype_alnum("$var"));
?>
 [2007-08-25 18:22 UTC] bjori@php.net 
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions.  Due to the volume
of reports we can not explain in detail here why your report is not
a bug.  The support channels will be able to provide an explanation
for you.

Thank you for your interest in PHP.
 [2007-08-27 08:57 UTC] phpbugs dot 20 dot zsh at spamgourmet dot com 
That's expected behavior? Reclassified...
 [2007-08-27 10:13 UTC] pajoye@php.net 
ctype_alnum ( string $text )

it takes a string not integer. Please see the manual for further support questions.
 [2007-08-28 09:55 UTC] phpbugs dot 20 dot zsh at spamgourmet dot com 
I don't see the problem! PHP is a weak-typed language... what about sleep() for instance?

void sleep ( _int_ $seconds )
<?php
sleep('5');
?>

So why shouldn't ctype_alnum just accept all scalar values as strings?
 [2007-08-28 10:18 UTC] pajoye@php.net 
"So why shouldn't ctype_alnum just accept all scalar values as strings?"

As it is a validation function, it has to be strict.
 
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