check if a variable is undefined or NULL

check if a variable is undefined or NULL

linked_class

code

linked_uid

SYTk7

views

17

week_num

50

month_num

12

year_num

22

id: 75201
uid: F4V1w
insdate: 2022-12-12 05:16:13
title: check if a variable is undefined or NULL
additional:
category:
linked_class: code
linked_uid: SYTk7
views: 17
week_num: 50
month_num: 12
year_num: 22

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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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