<?php

//Results returned as either:

Array
(
    [30871652] => ryan@fusionized.com
    [30871649] => ryan@fusionized.com
    [30871648] => ryan@fusionized.com
    [30871651] => ryan@fusionized.com
    [30871650] => ryan@fusionized.com
    [30871654] => ryan@fusionized.com
    [30871653] => ryan@fusionized.com
    [30871643] => ryanduff@gmail.com
    [30871644] => ryanduff@gmail.com
    [30871645] => ryanduff@gmail.com
    [30871647] => ryanduff@gmail.com
    [30871656] => ryanduff@gmail.com
    [30871655] => ryanduff@gmail.com
    [30871646] => ryanduff@gmail.com
)

//or can be returned as:

Array
(
    [0] => Array
        (
            [lead_id] => 30871656
            [email] => ryanduff@gmail.com
        )

    [1] => Array
        (
            [lead_id] => 30871655
            [email] => ryanduff@gmail.com
        )

    [2] => Array
        (
            [lead_id] => 30871653
            [email] => ryan@fusionized.com
        )

    [3] => Array
        (
            [lead_id] => 30871654
            [email] => ryan@fusionized.com
        )

    [4] => Array
        (
            [lead_id] => 30871651
            [email] => ryan@fusionized.com
        )

)

/**
  * Basically need to sort and count by email address on a variable limit.
  * Once the count is reached, the id's associated with any addional entries are added to a separate array to be deleted.
  *
  * Not sure the best approach to sort and filter though. Ideas?
  */


// Second array example trimmed so I'll use the first. In the case of a limit of 3 entries per address the result would be:

Array
(
    [0] => 30871651
    [1] => 30871650
    [2] => 30871654
    [3] => 30871653
    [4] => 30871647
    [5] => 30871656
    [6] => 30871655
    [7] => 30871646
)

//This equates to every ID matched on a unique email address past the limit. 3 in this case.