check if a variable is undefined or NULL

check if a variable is undefined or NULL

linked_class

code

linked_uid

SYTk7

views

30

week_num

46

month_num

11

year_num

21

id: 8154
uid: gJuHo
insdate: 2021-11-16 12:00:00
title: check if a variable is undefined or NULL
additional:
category:
linked_class: code
linked_uid: SYTk7
views: 30
week_num: 46
month_num: 11
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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