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  1. <?php
  2. 	$source = [
  3. 		[
  4. 			'id' 	=> 10,
  5. 			'count' => 1,
  6. 		],
  7. 		[
  8. 			'id' 	=> 15,
  9. 			'count' => 2,
  10. 		],
  11. 		[
  12. 			'id' 	=> 10,
  13. 			'count' => 3,
  14. 		],
  15. 		[
  16. 			'id' 	=> 12,
  17. 			'count' => 4,
  18. 		],
  19. 		[
  20. 			'id' 	=> 10,
  21. 			'count' => 5,
  22. 		],
  23. 	];
  24. 	$output = [];
  25. 	foreach($source as $arr) {
  26. 		if (!isset($output[$arr['id']])) $output[$arr['id']] = '';
  27. 		$output[$arr['id']] .= $arr['count'].',';
  28. 	}	
  29. 	var_dump($output);
Success #stdin #stdout 0.02s 20568KB
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array(3) {
  [10]=>
  string(6) "1,3,5,"
  [15]=>
  string(2) "2,"
  [12]=>
  string(2) "4,"
}
https://ideone.com/XYT8lb
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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