check if a variable is undefined or NULL

check if a variable is undefined or NULL

linked_class

code

linked_uid

SYTk7

views

8

week_num

3

month_num

1

year_num

23

id: 81509
uid: HSONb
insdate: 2023-01-16 00:00:21
title: check if a variable is undefined or NULL
additional:
category:
linked_class: code
linked_uid: SYTk7
views: 8
week_num: 3
month_num: 1
year_num: 23

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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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Random CSS Property

margin-top

The margin-top CSS property sets the margin area on the top of an element. A positive value places it farther from its neighbors, while a negative value places it closer.
margin-top css reference