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

9

month_num

3

year_num

23

id: 91178
uid: SVwan
insdate: 2023-03-02 12:51:10
title: check if a variable is undefined or NULL
additional:
category:
linked_class: code
linked_uid: SYTk7
views: 5
week_num: 9
month_num: 3
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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