Purpose of !$ and difference b/w isset and empty?

Asked Nov 28 '16 at 09:13

Active Nov 28 '16 at 09:51

Viewed 87 times

-9

What is the purpose of !$ in PHP?
What is the difference between isset and empty?

edited Nov 28 '16 at 09:51

Ronald

1,287
3
17
27

asked Nov 28 '16 at 09:13

php16

1
4

1) http://stackoverflow.com/q/3737139 2) http://stackoverflow.com/q/20582962 simple google search – Rizier123 Nov 28 '16 at 09:14

1 Answers1

0

!$ means NOT thus if (!$a) and $a == TRUE then it is NOT TRUE
Reference: http://www.php.net/manual/en/language.operators.logical.php
ISSET returns TRUE if the variable exists and has a value other than NULL
EMPTY checks to see if a variable is empty.
Reference: http://php.net/manual/en/function.isset.php http://php.net/manual/en/function.empty.php

answered Nov 28 '16 at 09:20

Ronald

1,287
3
17
27

1

Wonderful reply – php16 Nov 28 '16 at 09:35