How to check if variable is empty/null/NULL/not set/0

I know there are many ways like

empty($var)
is_null($var)
isset($var)
if(!$var)

But each one has different purpose. I want to have a combined function in laravel to check all these

Does laravel provide a single function to check all in one?

Need to check all possible like

NULL,null,'',0, undefined , not posted and others

Level 13

check this link may be its help

Level 70

If this data comes from the user form, you can define everything in form validation part. It will be easier for you to handle.

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Level 20

Regarding the php documentation, the following values are considered to be empty:

- "" (an empty string)
- 0 (0 as an integer)
- 0.0 (0 as a float)
- "0" (0 as a string)
- NULL
- FALSE
- array() (an empty array)

And isset() function may be used for undefined variables. But in Laravel you have to be careful when dealing with collections.

Level 2

@tisuchi : some time it comes from user form, some time in my function. i want to do it in php server side, it is not validation.

is there any function?

Level 2

@petrit so what is a combine expression or function who can handle all these cases?

Level 70

There are probably two options I can think of right now.

You need to write a regular expression then check whether it return value or not. In that case, you can easily handle without using many built-in functions.
By somehow if you need to use built-in functions, I believe you have to use at least two functions to cover all . of your criteria.

Now choose is yours, which one you will pick up.

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