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  1. <?php
  2. $arr = array ('0' => array ('cityID'=>1),
  3.  '1' => array ('cityID'=>2),
  4.  '2' => array ('cityID'=>3),
  5.  '3' => array ('cityID'=>1),
  6.  '4' => array ('cityID'=>2),
  7.  '5' => array ('cityID'=>2),);
  8.  
  9. $unique_arr = array_map('unserialize', array_unique(array_map('serialize', $arr)));
  10. var_dump($unique_arr);
Success #stdin #stdout 0.02s 52472KB
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stdin
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Standard input is empty
stdout
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array(3) {
  [0]=>
  array(1) {
    ["cityID"]=>
    int(1)
  }
  [1]=>
  array(1) {
    ["cityID"]=>
    int(2)
  }
  [2]=>
  array(1) {
    ["cityID"]=>
    int(3)
  }
}
https://ideone.com/ySYVCH
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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