check if a variable is undefined or NULL

check if a variable is undefined or NULL

linked_class

code

linked_uid

SYTk7

views

5

week_num

40

month_num

10

year_num

21

id: 2930
uid: 1fmGD
insdate: 2021-10-04 22:14:00
title: check if a variable is undefined or NULL
additional:
category:
linked_class: code
linked_uid: SYTk7
views: 5
week_num: 40
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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