PHP Intersect Array but not NULL Array
<p>I have five 2-D Arrays, (You can assume it like five spreadsheets), I want to take the intersection of the five (I want the common rows of all five in a new spreadsheet) but now I find out that one of the array is a NULL Array, (I find that instead of a spreadsheet, it's just a blank piece of paper), so now I want to ignore it and Intersect the rest of the Arrays... Please suggest a method of doing that...</p>

<p>P.S. - I know it is against the property of intersection because we all know that Intersection of anything with NULL is NULL, but that is not what I want...</p>

<p>P.S. - I also don't know how many Arrays can be empty, I just assumed it to be 1 as an Example, It can be 2, 3, 4 or Even 5... Yes, If it is 5,  then returning NULL is perfect but not in any other case... Suppose if 4 Arrays are NULL, then It should return the 5th Array...</p>

<p>Language Used : PHP</p>