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  1. <?php
  2.  
  3. $places = array( 
  4.    array("United Kingdom","London","Camden","1"), 
  5.    array("United Kingdom","London","Camden","5"),
  6.    array("United Kingdom","London","Camden","23"),
  7.    array("United Kingdom","London","Camden","71") 
  8. );
  9.  
  10. $temp = array();
  11. foreach($places as $items) {
  12.     $id = array_pop($items);
  13.     $key = serialize($items);
  14.     $temp[$key][] = $id;
  15. }
  16.  
  17. $result = array();
  18. foreach($temp as $k => $ids) {
  19.     $result[] = array_merge(unserialize($k), array($ids));
  20. }
  21.  
  22. print_r($result);
  23.  
Success #stdin #stdout 0.01s 20568KB
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stdin
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stdout
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Array
(
    [0] => Array
        (
            [0] => United Kingdom
            [1] => London
            [2] => Camden
            [3] => Array
                (
                    [0] => 1
                    [1] => 5
                    [2] => 23
                    [3] => 71
                )

        )

)
https://ideone.com/4BhaVe
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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