check if a variable is undefined or NULL

check if a variable is undefined or NULL

linked_class

code

linked_uid

SYTk7

views

25

week_num

42

month_num

10

year_num

21

id: 4468
uid: bC7It
insdate: 2021-10-18 00:47:14
title: check if a variable is undefined or NULL
additional:
category:
linked_class: code
linked_uid: SYTk7
views: 25
week_num: 42
month_num: 10
year_num: 21

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This is my test area for webdev. I keep a collection of code here, mostly for my reference. Also if i find a good link, i usually add it here and then forget about it. more...

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