php-general Digest 1 Apr 2013 02:46:46 -0000 Issue 8179
Topics (messages 320719 through 320721):
Re: isset empty or ...?
320719 by: ÐлекÑÐ°Ð½Ð´Ñ ÐенÑÑиков
320720 by: Jim Giner
Re: 4/1/2013 3:46:37 AM
320721 by: Adil Adil
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http://www.php.net/manual/en/types.comparisons.php
Maybe first table PHP functions comparison (including 'isset' and 'empty')
could help you.
31.03.2013 в 8:53, John Taylor-Johnston написал(а):
> I'm using
if($mydata->>DPRresponselocationaddress1 != "")
> is this the same as
if (!isset($mydata->>DPRresponselocationaddress))
> http://php.net/manual/en/function.isset.php
> or
if (!empty($mydata->>DPRresponselocationaddress))
> http://php.net/manual/en/function.empty.php
> or is there another function I have not learned yet? I don't really get
> the difference between isset and empty.
> John
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On 3/31/2013 12:53 AM, John Taylor-Johnston wrote:
I'm using
if($mydata->DPRresponselocationaddress1 != "")
is this the same as
if (!isset($mydata->DPRresponselocationaddress))
http://php.net/manual/en/function.isset.php
or
if (!empty($mydata->DPRresponselocationaddress))
http://php.net/manual/en/function.empty.php
or is there another function I have not learned yet? I don't really get
the difference between isset and empty.
John
The simple answer is that isset is supposed to tell you if a var has
been created; a test for "" is looking for a value of a var. While
sometimes the results can be the same (and therefore confusing) that is
what the two provide. How you use them is dependent on your
understanding of PHP and the task before you.
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http://www.siamphotographer.com/clvrcng/nikoffbkvvnjjcgwapmay.xmhpwcbrd
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