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  1. <?php
  2.  
  3. function key_compare_func($key1, $key2)
  4. {
  5.     if ($key1 == $key2)
  6.         return 0;
  7.     else if ($key1 > $key2)
  8.         return 1;
  9.     else
  10.         return -1;
  11. }
  12.  
  13. $array1 = array('blue'  => 1, 'red'  => 2, 'green'  => "3", 'purple' => 4);
  14. $array2 = array('green' => 3, 'blue' => 6, 'yellow' => 7, 'cyan'   => 8);
  15.  
  16. var_dump(array_diff_ukey($array1, $array2, 'key_compare_func'));
  17. var_dump(array_diff_uassoc($array1, $array2, 'key_compare_func'));
Success #stdin #stdout 0.01s 20520KB
comments (?)
stdin 
Standard input is empty
stdout 
array(2) {
  ["red"]=>
  int(2)
  ["purple"]=>
  int(4)
}
array(3) {
  ["blue"]=>
  int(1)
  ["red"]=>
  int(2)
  ["purple"]=>
  int(4)
}
https://ideone.com/g9IQXM
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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