How to remove emptiness from php array but not zero

The way to remove empties without removing zeros from a PHP array is to use strlen as the callback function, and the code statement for its implementation is such as "array_filter($array, 'strlen');".

The operating environment of this article: Windows7 system, PHP7.1 version, Dell G3 computer

php How to empty an array Not going to zero?

Specific problem description:

I want to remove NULL, FALSE and '' values. I've used array_filter but that also removes the 0's.

Is there any way?

array(NULL,FALSE,'',0,1) -> array(0,1)

Solution:

From http://php.net/manual/en/function.array-filter.php#111091:

If you want to delete NULL, FALSE and empty strings, but keep the value 0, you can use strlen as the callback function:

array_filter($array, 'strlen');

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