Comment on Tutorial - isset() function in PHP By Emiley J.
Comment Added by : Bijan
Comment Added at : 2012-09-21 20:49:41
Comment on Tutorial : isset() function in PHP By Emiley J.
The !isset() is basically checking if the string is NOT true.
Take the first example:
if (isset($first_name)) {
print '$first_name is set';
}
This checks if the var $first_name has been declared. In plain English, if user hasn't filled out the form "First Name" yet then it will return false when he submit it.
Now:
if (!isset($first_name)) {
//So the $first_name is not set obviously, not you want to notify the user that he must
//have it filled
print 'Please fill out your First Name';
}
For this one you are checking if the $first_name has NOT been declared. The "!" means "NOT", this is listed in the operators http://www.w3schools.com/php/php_operators.asp
There are two or more ways to do this and it depends on what your are tying to achieve.
I am not a "PRO" at php just yet since I just stated but you'll know this but reading the link I gave.Also please if I said something wrong please correct me. ^_^
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Archived Comments
1. Hi,
This is really urgent... my cod
View Tutorial By: Benetha at 2012-04-09 05:57:45
2. hi.I am new in j2me and really want to learn more
View Tutorial By: snehal at 2011-12-01 11:46:22
3. Very nice and easy to understand, keep it up !!
View Tutorial By: claudiu at 2010-02-07 06:12:30
4. Thanks,It's perfect solution,I solved my probleam
View Tutorial By: Suryaprakash Raghuwanshi at 2009-07-04 19:06:24
5. Very Useful example, Thanks
View Tutorial By: Prabhat Kumar Singh at 2011-12-21 20:44:00
6. Good,
Thank you man.
View Tutorial By: Goldo at 2010-07-12 14:56:14
7. its really helpful.thanks a lot
View Tutorial By: bena at 2015-03-04 10:39:46
8. excellent to easy going
View Tutorial By: murali at 2009-11-15 23:13:21
9. hai i have downloaded the above sms source code i
View Tutorial By: arunram at 2009-10-28 01:42:51
10. So I followed you steps with no compile errors. W
View Tutorial By: PointLookoutResident at 2014-10-14 19:01:11