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<?php $the_array = [ ['id' => 1, 'value' => 10, 'name' => 'apple'], ['id' => 1, 'value' => 20, 'name' => 'orange'], ['id' => 1, 'value' => 30, 'name' => 'banana'], ['id' => 2, 'value' => 100, 'name' => 'car'], ['id' => 2, 'value' => 200, 'name' => 'bicycle'], ]; $result = []; foreach ($the_array as $row) { if (!isset($result[$row['id']])) { $result[$row['id']] = $row; } else { $result[$row['id']]['value'] += $row['value']; $result[$row['id']]['name'] .= ",{$row['name']}"; } } var_export(array_values($result));
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 'id' => 1, 'value' => 60, 'name' => 'apple,orange,banana', ), 1 => array ( 'id' => 2, 'value' => 300, 'name' => 'car,bicycle', ), )

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