How would i use array_intersect() with the arrays in an array?

Question

I have a dynamic amount of arrays in a specific array.
Let's call this specific array: FatherArray

This FatherArray has a dynamic amount of arrays in it, right now for example: Child1Array,Child2Array. Next time it gets called it could have more or less than those 2 Child(number)Arrays.

So I want to use the function array_intersect() with the arrays (children) of FatherArray as parameters, so like array_intersect(Child1Array,Child2Array).
I don't have a clue how i could do this dynamically, neither could I find anything about it, any help would greatly be appreciated

Yoshi · Accepted Answer · 2017-11-09 12:19:31Z

1

If your version is reasonably new (v5.6):

array_intersect(...$FatherArray);

Otherwise:

call_user_func_array('array_intersect', $FatherArray);

Demo: see comment by Mark (thx @MarkBaker)

edited Nov 9, 2017 at 12:19

answered Nov 9, 2017 at 12:15

Yoshi

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4 Comments

Mark Baker Over a year ago

Demonstration and Demonstration 2

Christiaan Over a year ago

Thanks, however it returns an empty array for me. When i manually add it like array_intersect($FatherArray[0],$FatherArray[1]) it works fine. Thanks for the help so far tho! Edit: nvm, i am dumb. FatherArray[2] was empty..

Yoshi Over a year ago

@Christiaan Please add your code to the question, otherwise I can't tell what might be wrong.

Mark Baker Over a year ago

If you want to "ignore" empty child arrays, then $result = array_intersect(...array_filter($fatherArray)); or call_user_func_array('array_intersect', array_filter($fatherArray));

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