Question

If I have 2 PHP array’s that contain names. The first array contains over 100,000 keys

The second array is only 10,000 or less keys

I need to filter out any names from my 10,000 key array if the key exist in the master 100k array

So I will end up with a 3rd array that will contain the 10,000 key array minus any items that existed in the main array.

This is kind of confusing for me to explain so I hope I make sense here. If you can help I would appreciate it.

A sample array might look like this (both arrays will be in same format)

array(
    'Coders4africa',
    'uiri00',
    'phileverson',
    'nileshgr',
    'MSVenom',
    'dshafik',
    'rafavilar'
)

Answer 1

array_diff($array1, $array2)

From the docs: returns an array containing all the entries from array1 that are not present in any of the other arrays.