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From: "Tanel Tammik" on 7 Jun 2010 15:40
Hi,

empty() cannot check the return value of the method or function. which would
be the best workaround?

empty($class->method()) // gets an error

i could do

$method_return_value = $class->method() and then run empty() on
$method_return_value or is there an better option? i would like to do it in
if statement....

i wrote an class for handling file uploads and there is an method
getErrors() which returns empty array in case of 0 errors and i need to
check it before i move any files. i'm just curious, what is the right way to
do that!

Br
Tanel


From: Ashley Sheridan on 7 Jun 2010 15:52
On Mon, 2010-06-07 at 22:40 +0300, Tanel Tammik wrote:

> Hi,
>
> empty() cannot check the return value of the method or function. which would
> be the best workaround?
>
> empty($class->method()) // gets an error
>
> i could do
>
> $method_return_value = $class->method() and then run empty() on
> $method_return_value or is there an better option? i would like to do it in
> if statement....
>
> i wrote an class for handling file uploads and there is an method
> getErrors() which returns empty array in case of 0 errors and i need to
> check it before i move any files. i'm just curious, what is the right way to
> do that!
>
> Br
> Tanel
>
>
>


Are you sure this is what is giving you the error, as people are using
this fine in their examples on the manual page for empty()

Thanks,
Ash
http://www.ashleysheridan.co.uk


From: "Tanel Tammik" on 7 Jun 2010 15:56

"Ashley Sheridan" <ash(a)ashleysheridan.co.uk> wrote in message
news:1275940320.2248.40.camel(a)localhost...
> On Mon, 2010-06-07 at 22:40 +0300, Tanel Tammik wrote:
>
>> Hi,
>>
>> empty() cannot check the return value of the method or function. which
>> would
>> be the best workaround?
>>
>> empty($class->method()) // gets an error
>>
>> i could do
>>
>> $method_return_value = $class->method() and then run empty() on
>> $method_return_value or is there an better option? i would like to do it
>> in
>> if statement....
>>
>> i wrote an class for handling file uploads and there is an method
>> getErrors() which returns empty array in case of 0 errors and i need to
>> check it before i move any files. i'm just curious, what is the right way
>> to
>> do that!
>>
>> Br
>> Tanel
>>
>>
>>
>
>
> Are you sure this is what is giving you the error, as people are using
> this fine in their examples on the manual page for empty()
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>
>

from the php manual:

Note: empty() only checks variables as anything else will result in a parse
error. In other words, the following will not work: empty(trim($name)).

Br
Tanel


From: Peter Lind on 7 Jun 2010 16:02
On 7 June 2010 21:52, Ashley Sheridan <ash(a)ashleysheridan.co.uk> wrote:
> On Mon, 2010-06-07 at 22:40 +0300, Tanel Tammik wrote:
>
>> Hi,
>>
>> empty() cannot check the return value of the method or function. which would
>> be the best workaround?
>>
>> empty($class->method())   // gets an error
>>
>> i could do
>>
>> $method_return_value = $class->method() and then run empty() on
>> $method_return_value or is there an better option? i would like to do it in
>> if statement....
>>
>> i wrote an class for handling file uploads and there is an method
>> getErrors() which returns empty array in case of 0 errors and i need to
>> check it before i move any files. i'm just curious, what is the right way to
>> do that!
>>
>> Br
>> Tanel
>>
>>
>>
>
>
> Are you sure this is what is giving you the error, as people are using
> this fine in their examples on the manual page for empty()
>

Empty only works on variables, not return values from functions.

If you're checking the return value from a function, just do if
($class->method()). The return value will be cast to bool - look here
for the conversions:
http://dk2.php.net/manual/en/language.types.boolean.php

Regards
Peter

--
<hype>
WWW: http://plphp.dk / http://plind.dk
LinkedIn: http://www.linkedin.com/in/plind
BeWelcome/Couchsurfing: Fake51
Twitter: http://twitter.com/kafe15
</hype>
From: "Tanel Tammik" on 7 Jun 2010 16:07

"Peter Lind" <peter.e.lind(a)gmail.com> wrote in message
news:AANLkTinmvaqv-hdgJlQ_dwOQUvoJBBMBfRiXNxvqK-mG(a)mail.gmail.com...
On 7 June 2010 21:52, Ashley Sheridan <ash(a)ashleysheridan.co.uk> wrote:
> On Mon, 2010-06-07 at 22:40 +0300, Tanel Tammik wrote:
>
>> Hi,
>>
>> empty() cannot check the return value of the method or function. which
>> would
>> be the best workaround?
>>
>> empty($class->method()) // gets an error
>>
>> i could do
>>
>> $method_return_value = $class->method() and then run empty() on
>> $method_return_value or is there an better option? i would like to do it
>> in
>> if statement....
>>
>> i wrote an class for handling file uploads and there is an method
>> getErrors() which returns empty array in case of 0 errors and i need to
>> check it before i move any files. i'm just curious, what is the right way
>> to
>> do that!
>>
>> Br
>> Tanel
>>
>>
>>
>
>
> Are you sure this is what is giving you the error, as people are using
> this fine in their examples on the manual page for empty()
>

Empty only works on variables, not return values from functions.

If you're checking the return value from a function, just do if
($class->method()). The return value will be cast to bool - look here
for the conversions:
http://dk2.php.net/manual/en/language.types.boolean.php

Regards
Peter

--
<hype>
WWW: http://plphp.dk / http://plind.dk
LinkedIn: http://www.linkedin.com/in/plind
BeWelcome/Couchsurfing: Fake51
Twitter: http://twitter.com/kafe15
</hype>

Thanks! It works...

<?php
class TestClass {
protected $errors = array();

function getErrors() {
return $this->errors;
}
}

$class = new TestClass;

if($class->getErrors()) {
echo 'there is an value!';
} else {
echo 'empty';
}
?>

No need to complicate things.

Br
Tanel


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