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<?php $arrays = [ [ "1-1", "1-2", "1-1", "1-2", "1-1", ], [ "3-3", "3-3", "3-4", "3-4", "3-3", ], ]; $first = array_shift($arrays); $res = array_reduce($arrays, function($carry, $item){ foreach($item as $key => $value) { $carry[$key] = $carry[$key] . "," . $value; } return $carry; }, $first); print_r($res);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [0] => 1-1,3-3 [1] => 1-2,3-3 [2] => 1-1,3-4 [3] => 1-2,3-4 [4] => 1-1,3-3 )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/U0JKU on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/U0JKU on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/U0JKU on line 3
Process exited with code 255.

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