RE: [PHP] alternative to empty
May be you can try (string)$string or (int)$string (seemed a little
strange).
Any way Ross, we need to see ur code to determine your problem.
Best regards,
Shiqi Yang
-Original Message-
From: Philip Hallstrom [mailto:[EMAIL PROTECTED]
Sent: Thursday, July 07, 2005 12:15 AM
To: Dan Rossi
Cc: Ross; php-general@lists.php.net
Subject: Re: [PHP] alternative to empty
I have been using empty in forms for some time now. but have just
discovered
that
PHP 4 As of PHP 4, The string value 0 is considered empty.
If ($string == '') ??
Careful... notice the differenec b/n == and ===
?php
$s = 0;
if ($s == '') {
print(==\n);
}
if ($s === '') {
print(===\n);
}
?
% php foo.php
==
%
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Re: [PHP] alternative to empty
Hi, On 7/6/05, Ross [EMAIL PROTECTED] wrote: I have been using empty in forms for some time now. but have just discovered that PHP 4 As of PHP 4, The string value 0 is considered empty. Is there an alternative that will just check for empty strings. I suppose I could just use eregi and check for numbers but thought there may be a function that would work in a similar way. R. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php http://www.php.net/manual/en/types.comparisons.php Very usefull !! I'll suggest you to print this out for quick reference. Salud! pancarne. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] alternative to empty
I have been using empty in forms for some time now. but have just discovered that PHP 4 As of PHP 4, The string value 0 is considered empty. Is there an alternative that will just check for empty strings. I suppose I could just use eregi and check for numbers but thought there may be a function that would work in a similar way. R. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alternative to empty
On 06/07/2005, at 7:55 PM, Ross wrote: I have been using empty in forms for some time now. but have just discovered that PHP 4 As of PHP 4, The string value 0 is considered empty. If ($string == '') ?? or if (isset($string)) ?? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alternative to empty
On Wed, 2005-07-06 at 10:55 +0100, Ross wrote: I have been using empty in forms for some time now. but have just discovered that PHP 4 As of PHP 4, The string value 0 is considered empty. Is there an alternative that will just check for empty strings. I suppose I could just use eregi and check for numbers but thought there may be a function that would work in a similar way. R. If a string is empty, it should be == '' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alternative to empty
what about checking that the length is 0 but i think the other suggestions are fine. André Medeiros wrote: On Wed, 2005-07-06 at 10:55 +0100, Ross wrote: I have been using empty in forms for some time now. but have just discovered that PHP 4 As of PHP 4, The string value 0 is considered empty. Is there an alternative that will just check for empty strings. I suppose I could just use eregi and check for numbers but thought there may be a function that would work in a similar way. R. If a string is empty, it should be == '' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alternative to empty
On Wed, 2005-07-06 at 20:23 +1000, Dan Rossi wrote: On 06/07/2005, at 7:55 PM, Ross wrote: I have been using empty in forms for some time now. but have just discovered that PHP 4 As of PHP 4, The string value 0 is considered empty. If ($string == '') ?? or if (isset($string)) ?? $string may be defined and still be empty ;) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alternative to empty
On Wed, 2005-07-06 at 13:20 +0200, Angelo Zanetti wrote: what about checking that the length is 0 Checking if length 0 requires calling a function, wich takes longer (it's a ridiculous difference, but still...) but i think the other suggestions are fine. André Medeiros wrote: On Wed, 2005-07-06 at 10:55 +0100, Ross wrote: I have been using empty in forms for some time now. but have just discovered that PHP 4 As of PHP 4, The string value 0 is considered empty. Is there an alternative that will just check for empty strings. I suppose I could just use eregi and check for numbers but thought there may be a function that would work in a similar way. R. If a string is empty, it should be == '' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alternative to empty
On 06/07/2005, at 10:47 PM, André Medeiros wrote: If ($string == '') ?? or if (isset($string)) ?? $string may be defined and still be empty ;) Hence my first example :P -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alternative to empty
I have been using empty in forms for some time now. but have just
discovered
that
PHP 4 As of PHP 4, The string value 0 is considered empty.
If ($string == '') ??
Careful... notice the differenec b/n == and ===
?php
$s = 0;
if ($s == '') {
print(==\n);
}
if ($s === '') {
print(===\n);
}
?
% php foo.php
==
%
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