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  1. <?php
  2.  
  3. $arr = array(
  4. 	array(
  5. 		"category_name" => "Operating System",
  6. 		"sub_category_name" => "Windows 8"
  7. 	),
  8. 	array(
  9. 		"category_name" => "Operating System",
  10. 		"sub_category_name" => "Linux"
  11. 	),
  12. 	array(
  13. 		"category_name" => "Mobile",
  14. 		"sub_category_name" => "Nokia"
  15. 	)
  16. );
  17.  
  18. $n = array();
  19.  
  20. $n = array();
  21. $i = 0;
  22.  
  23. array_walk($arr, function($subArr) {
  24. 	global $n;
  25. 	global $i;
  26. 	$n[$subArr['category_name'] . $i] = $subArr['sub_category_name'];
  27. 	$i++;
  28. });
  29.  
  30. var_dump($n);
Success #stdin #stdout 0.01s 20568KB
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stdin
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stdout
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array(3) {
  ["Operating System0"]=>
  string(9) "Windows 8"
  ["Operating System1"]=>
  string(5) "Linux"
  ["Mobile2"]=>
  string(5) "Nokia"
}
https://ideone.com/7RXbUq
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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