Re: Beginners query
| From: | Domain nikha . org | Date: | Sat, 03 Jan 2015 19:04:19 +0000 |
| Subject: | Re: Beginners query | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-324218@lists.php.net to get a copy of this message | ||
Wan Chaowei am Freitag, 2. Januar 2015 - 22:20:
> i think you don't read any Document
>
> isset: http://php.net/manual/en/function.isset.php
> empty: http://php.net/manual/en/function.empty.php
>
>
>
> website: http://5go.cc/
> QR Code Generator: http://5go.cc/QRCodeGenerator
> "Sachin Raut" 写入消息
> news:CAEg3z6F9m+E=R+c6ndnZLOVcq_BcotUHTy2qNcMvEoS9Uk+kmg@mail.gmail.com....
>
>
> Happy New Year to all members of PHP group.
>
> I just want to know the difference between following 3 statements. Or are
> they all does the same thing.
>
> 1. isset($a)
> 2. !empty($a)
> 3. $a!=""
>
> Thanks
> Sachin
if $a exixsts, then 1 is TRUE even when 2 and 3 are FALSE
2 may be slower than 3, but they mean the same
Greetings,
Niklaus