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  1. <?php
  2.  
  3. $arr = [
  4. 	[
  5. 		'COLOR'    => 'Red',
  6.     	'WEIGHT'   => 20
  7. 	],
  8.  
  9.     [
  10.         'COLOR'    => 'Red',
  11.         'WEIGHT'   => 25
  12.     ],
  13.  
  14.     [
  15.         'COLOR'    => 'Red',
  16.         'WEIGHT'   => 30
  17.     ],
  18.  
  19.     [
  20.         'COLOR'    => 'Green',
  21.         'WEIGHT'   => 20
  22.     ],
  23.  
  24.     [
  25.         'COLOR'    => 'Green',
  26.         'WEIGHT'   => 25
  27.     ],
  28.  
  29.     [
  30.         'COLOR'    => 'Green',
  31.         'WEIGHT'   => 30
  32.     ]
  33. ];
  34.  
  35. $out = [];
  36.  
  37. foreach ($arr as $a) {
  38.     $out[$a['COLOR']][] = $a['WEIGHT'];
  39. }
  40.  
  41. foreach (array_map(function($a){ return join(', ', $a); }, $out) as $k => $item) {
  42.     echo "$k $item\n";
  43. }
Success #stdin #stdout 0.02s 24420KB
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Standard input is empty
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Red 20, 25, 30
Green 20, 25, 30
https://ideone.com/E1NWbW
language:
PHP (php 7.3.5)
created:
4 years ago
visibility:
public

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